if条件状语从句_语法

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if 条件状语从句

if 条件状语从句

if引导的条件状语从句引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。

如:一,第一类:1)表示普遍真理和客观事实:If you heat ice ,it melts .If you pour oil on water,it floats.不受时间限制的自然法则的条件句,主句,从句都是一般现在时。

2)表示习惯性的动作If I make a promise , I take it .If it rains ,I go to work by car.表示一个现在习惯性的动作,主句和从句的谓语动词都是一般现在时。

3)表示过去的习惯性,经常的动作If it rained,I went to work by car.If I was hungry, I usually had a full meal.主句和从句谓语动词要依据时间来变为一般过去时。

questions and answers :What do you like to drink if you are very thirsty?How many days are there in February it it is a leap year ? Who do people go and see if they get ill ?第二类:If we catch the 10 o’clock train ,we shall (will ,can,may,must ,should ) get there in time .If it is fine tomorrow ,we can have a picnic somewhere.If you wake up before me , give me a call .条件句(从句)用一般现在表示将来,主句用shall 加动词原型或者是祈使句在if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态。

if条件状语从句语法

if条件状语从句语法

当句末为or not时,引导词只能用whether而不能用if.
第6页
If 与whether 区分
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
3 If she__w__in_s___ (win) the prize ,we _w_i_ll_b__e_(be) happy. 4.If I __d_o_n_’__t _e_at (not,eat )so much ,I _w__il_l _g_e_t__(get) thinner.
5.If you __te_l_l __(tell) them, they __w_o_n_’__t__b_e_li_e_ve(not,believe) you. 6 I __w_i_ll_s_t_a_y_(stay) at home,If it ___ra_i_n_s____( rain). 7.If it _d__o_e_s_n_’__t ___(not,rain) ,I __w__il_l _g_o__( go) out.
5. 以下从句中will不是未来时助动词,而是情态动词。 翻译为“愿意”。
If you will excuse me,I really must go to bed . 假如你能原谅我话,我真要睡觉了。
If you will wait a minute ,I’ll go and tell my mother that you are here .
If you are free this weekend, what will you do ?

(完整版)if条件状语从句_语法

(完整版)if条件状语从句_语法
If从句 条件状语从句
What will I do if it is sunny this weekend?
Part1:If 的用法
1.I want to know if he will go to park with us. 宾语从句 2. We will have a picnic if it doesn’t rain.
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
If I’m late, _I _w_i_ll__s_a_y_rrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
3. If you boil water, it becomes steam.
4. If you feel tired, you must have a rest. 条件状语从句
语法1:if作为宾语从句 的引导词,引导宾语从 句。(是否)
语法2:if(如果)引 导的条件状语从句
❀ if 用于宾语从句中
当句末为or not时,引导词只能用whether而不能用if.
If 与whether 的区别
1. I don’t know _____ he will come or not. 与or not 连用只能用whether

if 引导条件状语从句

if 引导条件状语从句

if 引导条件状语从句摘要:1.了解IF引导条件状语从句的定义和作用2.分析IF引导条件状语从句的语法结构3.举例说明IF引导条件状语从句的用法4.对比IF引导条件状语从句与其他条件表达方式的差异5.总结IF引导条件状语从句的注意事项正文:在英语语法中,IF引导的条件状语从句是一种常见的关系从句,用于表示某个条件成立时,主句所表达的结果或行为会发生。

IF引导条件状语从句的主要作用是说明条件与结果之间的关系,以便在句子中表达清晰、准确的逻辑关系。

IF引导条件状语从句的语法结构如下:1.条件状语从句:IF + 条件(主语+ 谓语)2.主句:主语+ 谓语+ 宾语(或其他成分)例如:1.If it rains tomorrow, we will stay at home.(如果明天下雨,我们将呆在家里。

)2.If you study hard, you will pass the exam.(如果你努力学习,你就会通过考试。

)与其他表示条件的表达方式相比,IF引导的条件状语从句具有一定的优势:1.相较于使用“万一”、“如果”等词汇,IF引导的条件状语从句更加简洁、明了。

2.IF引导的条件状语从句可以清晰地呈现条件与结果之间的关系,使句子逻辑更加清晰。

在使用IF引导条件状语从句时,需要注意以下几点:1.条件状语从句中的条件可以是真实的,也可以是假设的。

2.条件状语从句中的条件通常用现在时态表示,但也可以根据需要使用其他时态。

3.主句中的谓语动词通常表示结果或行为,如:be、become、do、go 等。

总之,IF引导条件状语从句是英语中表达条件与结果关系的一种重要手段。

If引导的条件状语从句

If引导的条件状语从句

If引导的条件状语从句很多英语学习者都觉得If引导的条件状语从句这个句型很难,学习起来很吃力。

下面是店铺为你整理的If引导的条件状语从句的相关资料,希望大家喜欢!If引导的条件状语从句用法1.if引导的条件状语从句可以放在主句之前,也可以放在主句之后,如果放在主句之前,中间要用逗号将主句和从句隔开。

例如:If I am free, I will come to see you.= I will come to see you if I am free.如果我有空,我就来看你。

2. 在含if引导的条件状语从句的复合句中,主句用一般将来时,从句通常用一般现在时态表示将来意义,即“主将从现”原则。

例如:If it snows tomorrow, we will go skiing.如果明天下雪,我们就去滑雪。

3. 在含if引导的条件状语从句的复合句中,语句的谓语还可含有情态动词can、must、may等,主句也可是祈使句。

例如:If it stops raining, we can go out.如果雨停了,我们就能出去。

4. 在含if引导的条件状语从句的复合句中,如果主句部分描述的是客观事实或真理,要用一般现在时。

例如:If you heat the ice, it turns into water.如果你加热冰,它就会变成水。

if引导的非真实条件句对过去的虚拟条件从句(if):主语+had done 主句might/would/should/could+have done对现在的虚拟if+ 主语+动词过去式(be用were)主句might/would/should/could+do对将来的虚拟if+主语+动词过去式(be用were)或主语+should do或主语+were to do主句 might/would/should/could+doe.g.Tom got to the station in time because he started earlier.If Tom had started late, he would have missed the train.Do you think the thief entered through the door?No, if he had, I don't believe, he would have broken the living room window.If the book weren't so expensive, I would buy it.If you didn't live so far away, we would be able to visit you more.What would you do if you lost your passport in a foreign country?Why hasn't he come? If he should not come on time, we would have to put off the trip.2.注意事项e.g.If she hadn't work hard at English in the past, she wouldn't work as well as a secretary in a large company now. 混合时间的虚拟语气从句为对过去的虚拟,主句是现在。

if在条件状语从句中的用法归纳

if在条件状语从句中的用法归纳

if在条件状语从句中的用法归纳下面是小编整理的一些关于if 在条件状语从句中的用法,希望对大家有帮助。

if是英语中的一个常见词汇,可用作连词和名词,用法多变,意义多样。

无论在口语还是书面语中都是一个常用词,用法灵活,词意多样,需要我们在平时的学习和使用中用心把握if 在条件状语从句中的用法归纳虚拟语气用来表示说话人所说的话并不是事实,而是一种假设、愿望、怀疑或推测。

if 条件状语从句中虚拟语气的判断:if 条件状语从句有真实条件句和非真实条件句。

假设条件是可以实现的句子为真实条件句,反之为非真实条件句,要用虚拟语气。

其形式分为以下三种:(1) 与过去事实相反的假设。

结构为:从句的谓语动词用“had + 过去分词”,主句用“should (would, could, might) + have + 过去分词”。

If it had not rained so hard yesterday, we could have played tennis.如果昨天没有下大雨,我们就能玩网球了。

(2) 与现在事实相反的假设。

结构为:从句的谓语动词用过去式,系动词用were,主句的谓语用“should (would, could, might) + 动词原形”。

If I were in your position, I would marry her.如果我是你,我就娶她为妻。

(3) 与将来事实相反的假设。

结构为:从句的谓语动词用“should (were to) + 动词原形”,主句用“shou ld(would, could, might) + 动词原形”。

If you should miss the chance, you would feel sorry for it.如果你错过了这次机会,你会难过的。

if引导的条件状语从句

if引导的条件状语从句

if引导的条件状语从句(一)概念if连词的意思是“如果”,它引导的句子表示某事发生所需要的条件,在句子中充当状语,因此我们称之为条件状语从句,在复合句中的连词引导的句子为从句。

从句可以放在主句后也可以放在主句前。

从句放在主句前时,应用逗号将它与主局隔开。

例如:If it doesn't rain tomorrow ,we'll go to the Great Wall .We'll go to the Great Wall if it doesn't rain tomorrow .=(二)if引导的条件状语从句的用法1,如果主句为一般将来时,if引导的条件状语从句的用法通常为一般现在时。

例如If he doesn't go hiking tomorrow, I won't either . 如果他明天不去徒步旅行,我也不会去。

He'll go with us ,if he is free tomorrow. 如果他明天有空,他蒋和我们一起去。

2,当主句中含有情态动词等时can may must,从句常用一般现在时。

例如.You must hurry if you want to go swimming with us .如果你想要和我们一起去游泳就必须快一点。

You can stay here if you like . 你如果愿意可以留在这儿。

3,当主句为祈使句时,那么从句也常用一般现在时。

例如;If Mr Green leaves for HONGKong tomorrow ,Please let me know .如果格林先生明天启程去香港,请让我知道。

Come and play with me if you have time on Sunday .如果你星期天有空,来和我一起玩。

Please call me if you have questions .如果你有任何问题请给我打电话。

If引导的条件状语从句

If引导的条件状语从句

5. If you __d_o_n_’_t _w_o_rk___(not work ) hard , you _w_o_n_’_t _p_as_s_(not pass) the exam.
6. If she __m__e_n_d_s_(mend) the computer , her father __w_o_n_’t_b_l_am__e_(not blame ).
1.有if引导的条件状语从句的复合句中,当主句和从句的 主语均为you时,可转换为“祈使句,and+简单句”或
“祈使句,or+简单句” You can pass the exam if you work hard. Work hard ----------------,and you will pass the exam.
If you don't hurry up,you will be late again.
or Hurry up,------ you will be late again.
2. 借助介词with 或without来转换。
例如: If you help me, I’ll finish my job soon.
If引导的条件状语从句
潘店镇中学
if引导的条件状语从句
例句:If people obey the traffic rules, →从句 there will be fewer accidents. →主句
if:从属连词,意思是:“如果,假如,倘若”
: 结构
if引导的条件状语从句既可以放在句子前, 也可以放在句子后。
时态:
if引导的条件状语从句, 主句用一般将来时(will),从句用一般现在时。
→主句谓语中也可以含有情态动词, 如:must,can,could,should等

总结好的:if引导的条件状语从句

总结好的:if引导的条件状语从句

总结好的:if引导的条件状语从句if引导的条件状语从句if1) ⽤法:(1)条件状语从句通常由连词if引导,意为“如果、假如”,主句不能⽤be going to表⽰将来,⽽应该⽤shall,will。

If you leave now, you are never going to regret it. (错误)If you leave now, you will never regret it. (正确)(2)if “如果”,引导条件状语从句,主句⽤⼀般将来时,从句则⽤⼀般现在时,如:If it rains tomorrow, I shan’t climb the hills.(3)另外,主句是祈使句或含有情态动词,从句也⽤⼀般现在时。

如:Please call me if he comes next Sunday.Can you call the policeman if you are in the trouble.注意宾语从句中的if与条件状语从句if的区别。

宾语从句中的if“是否”相当于whether,引导宾语从句,时态需根据语境确定。

如果主句⽤⼀般现在时,从句可以根据具体情况选⽤时态,如果主句⽤⼀般过去时,从句必须⽤过去式的某种形式。

I don't know if it will rain tomorrow. 我不知道明天是否会下⾬。

Our teacher said there was going to be a football match the next month.我们说下⽉将有场⾜球⽐赛。

【边学边做】⽤括号内所给词的正确形式填空。

1. What will you buy if you ________(have)a lot of money?2. If it ________(not snow)tomorrow, we will feel unhappy.3. You mustn’t go to school if you ________(be)still in bed.4. If he _______(be)at home at that time, he would know it.5. Please show me the way if you ________(know)it.6. You will hurt your teeth if you ________(eat)too much candy.7. If you gave me a toy car, I _________(be)very happy.8. I would get the prize if I _________(work)hard.9.If she ______ (finish ) work early ,she ______(go) home.10.If the weather______(be)fine,we_______(go)for a walk .11. If I_____(have) time tonight ,I _______(finish) the book I’m reading.12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable .13. If it_______(rain),we______(stay) at home .14.If she______(arrive) ,she _____(phone) me .15. If he_____(call),tell him I’ll ring back .⼆、⽤所给词的适当形式填空1. If you ________(feel) tired, you _________ (have) to have a rest.2. Where _____ he ____(see) the film if he _________(have) time?3. If there ____ (be) fewer trees, there _______ (be) more pollution.4. He ___ (dress) more casually if he ___ (not work) on weekends.5. If Marcia _______ (live) alone, she _______ (keep) a pet parrot.6. Lana _____ (buy) a new dress if the old one ____ (be) out of style.7. The twins _______ (fight) if they__________ (argue).8. I ______ (have) a bake sale if I ____ (need) money for education.9. Peter ____ (send) me a beautiful souvenir if he ____(tour) Spain.10. If Mr. Green _______ (say) I am hard- working, my parents ___ (feel) glad.11. I ______ (go) to the beach if it________ (not rain) this week.12. _____they ___ (have) a match if the P.E. teacher __ (be) busy?13. He ____ (write) a letter to his grandparents if he ____ (get) his report card this week.14. If she ______ (get) up late, she _____ (not catch) the early bus.15. Peter ____ (major) in English if he ____(pass) the exams in Peking University.⼆、完成句⼦1. 他如果看电视太久了,他的⽗母会不⾼兴。

If引导的条件状语从句

If引导的条件状语从句

编辑课件
4
变换:
1.有if引导的条件状语从句的复合句中,当主句和从句的 主语均为you时,可转换为“祈使句,and+简单句”或
“祈使句,or+简单句”
You can pass the exam if you work hard. Work hard ----------------,and you will pass the exam.
for you , it will be good for your study.
编辑课件
12
5. If you __d_o_n_’_t _w_o_rk___(not work ) hard , you _w_o_n_’_t _p_as_s_(not pass) the exam.
6. If she __m__e_n_d_s_(mend) the computer , her father __w_o_n_’t_b_l_am__e_(not blame ).
W--i-t-h--y--o-u--r--h--e-l-p-, I’ll finish my job soon. 如果你帮我,我将很快完成我的工作。 If there is no water, fish may die.
Fish may die w--i-th--o--u-t--w--a--t-e-r--. 如果没有水,鱼可能会死。
I won’t go there unless I hear from you.(同义 if 句) don’t
I won’t go there _____ I _____hear from you. I won’t go to the party if I am not invited. (同义 句) unless I won’t go to the party_____ I am invited.

if引导的条件状语从句的用法

if引导的条件状语从句的用法
(一)真实条件句,假设的条件是
(3)假设
真的,或者有可能成为真的;
(二)假设将来,假设的条
将来

件是将来可能实现的。
1. if 非真实条件句(虚拟)——假设现在
(二)遵循的原则
should do
might+do
例 7 If I _____(be) a bird,I would fly to you right
状态,是正在玩球的意思,
所以此空填 is playing。
3. if 引导的真实条件状语从句——假设将来
例 3 If it _____(rain) tomorrow,we will stay at home.
解析:如果你不想受伤,
就不要玩刀。根据 Don’
t
play with the knife,主句是祈使句,所以从句为 if 引导
to the park.
he will take me to the park,主句用的一般将来时,而且
可以分析出,他哥哥现在还没有回,所以从句为 if 引
导的表将来的条件状语从句。根据“主将从现”的原
则,此空填 comes。
2. if 非真实条件句(虚拟)——假设过去
例8
Years ago if someone_____ (turn) round to
批改学生作文时,遇到拼写错误较多的学生可以这样
及各个时代相关代表作品的赏析,感受中西方文化的
评价:
不同,提高其审美水平;在进行人教版(2014)高中英
neat and tidy!
学生参观学校的科学实验室或者本地的科技馆,感受
1. 认 同 欣 赏:I like your handwriting,which is so

原创PPT八上U10语法课(If条件状语从句)

原创PPT八上U10语法课(If条件状语从句)

通过改错练习,加深 对if条件状语从句的 理解和运用。
翻译题训练
将中文句子翻译成英文,注意使 用if条文表达差异,提高 翻译准确性和流畅度。
分析翻译难点和易错点,总结翻 译技巧和方法。
写作题训练
根据所给话题和提示,运用if条 件状语从句写一篇短文。
注意文章结构、逻辑关系和语 言表达的准确性和得体性。
通过写作练习,提高运用if条件 状语从句的能力和写作水平。
THANKS
感谢观看
主过从过
主句用一般过去时,从句也用过 去的某种时态。例如:If I had time yesterday, I would have
gone shopping.
语态应用技巧
主动语态
表示主语是动作的执行者。在If条件状语从句中, 常用主动语态表示条件或假设。
被动语态
表示主语是动作的承受者。在某些情况下,为了 强调动作的对象或使句子更加客观,可以使用被 动语态。
If条件状语从句也可以位于主句之后,不用逗号与 02 主句隔开,表示“如果……就”。
在某些情况下,If条件状语从句还可以插入到主句 03 中间,但需要用逗号将其与主句其他部分隔开。
引导主从复合句功能
01 If条件状语从句可以引导一个主从复合句,其中主 句表示结果,从句表示条件。
02 If条件状语从句的引导功能使得句子结构更加复杂 ,能够表达更加丰富的语义关系。
02 通过使用If条件状语从句,可以使句子更加紧凑, 避免过多的简单句堆砌。
省略情况
在某些情况下,If条件状语从句可以省略if,而将条件部分放到主句前面,形成倒装 句。
当If条件状语从句中的主语与主句主语相同时,从句中的主语和be动词可以省略, 形成省略句。

初中基础语法--专题六、if引导的条件状语从句

初中基础语法--专题六、if引导的条件状语从句

初中基础语法--专题六、if引导的条件状语从句一、if 引导的条件状语从句的用法:1、表示在某种条件下某事很可能发生。

表示假如有从句的动作发生,就会或不会有主句的动作发生。

主句用一般将来时态,从句用一般现在时代替一般将来时,即“主将从现”If we pay much attention to the earth, we will have a better world.If it rains tomorrow, what shall we do?If it doesn’t rain tomorrow, we will go fishing.2、如果if 条件句谈论的是事实,则主从句大多用一般现在时态。

If bears are in danger, they attack people.巧学妙记if 条件句不一般,几个要点记心间;条件句,放在前, 逗号要放句中间。

条件句表可能,主句多用将来时;条件句表事实,主句常用现在时。

二、if 引导的条件状语从句的位置:if 条件句位置灵活,可直接放在主句后面,若if 条件句放句首,从句后面要加逗号,和主句隔开。

We can walk there if we can't find a bus .If it rains tomorrow, we will not go to the zoo.if 条件状语从句的练习一.选择正确的答案填空1.May ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (will agree/ agree/agrees) soon.3. If there (will be/ are/is) a car accident, they (will call/call/calls) 110 for help at once.4. If it (won’t/don’t/doesn’t/ isn’t) rainy, we (will take/ take/takes) walk outside.5. If a UFO (will land/land/lands) in front of me, I (will go/go/goes) in to look for the alien.6. If he (will have/have/has) money, he (will build/build/builds) a science lab.二、用所给词的适当形式填空1.If you ________(feel) tired, you _______________ (have) to have a rest.2. Where _______ he _________(see) the film if he __________(have) time?3. If there __________(be) fewer trees, there _______________( be) more pollution.4. He __________(dress) more casually if he ___________( not work) on weekends.5. If May _____________(live) alone, she ____________( keep) a pet parrot.6. Lana ____________( buy) a new dress if the old one ___________(be) out of style.三、单项选择1.If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going2.--Do you know when she will come back tomorrow?--Sorry, I don’t know. If she ____ back, I’ll tell you.A. comesB. will comeC. comeD. may come3. What will father _____ us from Japan?A. takeB. bringC. carryD. make4.Weifang is famous ______ kites.A. forB. toC. onD. with5.I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks6. --What are you going to do tomorrow?--We’ll go to the library tomorrow if it ___.A. isn’t rainB. rainC. won’t rainD. doesn’t rain7.You can to the station if you can’t find a taxi.A. walksB.walkC.walkesD. will walkif 条件状语从句的综合练习一.选择正确的答案填空1.Don’t wait for me if I (am/ will be) late.2.They (won’t/don’t) go to the beach if it (will rain/rain /rains).3. I (will call/ call) you if he (will stay/stay /stays) at home.4. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.5. (Will / Do/ Does) he visit the museum if he (won’t / don’t/ doesn’t) get tired?6. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?二、用所给词的适当形式填空1.The twins _____________(fight) if they_____________(argue).2.Peter________(major) in English if he ____(pass) the exams in Peking University.3. Peter __________( send) me a beautiful souvenir if he __________(tour) Spain.4. If Mr Green ______(say) I am hard- working, my parents __ _____( feel) glad.5.I _________(go) to the beach if it___________ ( not rain) this week.6. _______they ________(have) a match if the P.E. teacher _________(be) busy?7.He ____(write) a letter to his grandparents if he ____(get) his report card this week.8. If she _______(get) up late, she _____________ ( not catch) the early bus.三、单项选择1. What will you do if you _____ to the old folk’s home visit?A. goB. wentC.goingD. will go2. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too3. I’ll give the book to h im if he ___ here next Sunday.A. will comeB. comesC. is comingD. came4. There ____an English film in our school tomorrow.A. is going to haveB. will haveC. is going to beD. has5. I’ll wake you up if he ____back.A. willB. is going to comeC. comesD. come。

if+引导的条件状语从句

if+引导的条件状语从句

一.引导条件状语从句最常用的连词是if,常见的if 条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。

如:If you ask him,he will help you.如果你请他帮忙,他会帮你的。

If you fail in the exam,you will let him down.如果你考试不及格,你会让他失望的。

If you have finished the homework, you can go home.如果你作业做完了就可以回家了。

二.if 从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。

从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。

如:If I were you,I would invite him to the party.如果我是你,我会邀请他参加聚会。

I would have arrived much earlier if I had not been caught in the traffic.要不是交通堵塞,我本会来得早一些。

另外你还要注意if 条件句的时态搭配1.if 从句用一般现在时,主句用一般将来时If he runs he’ll get there in time.如果他用跑的,他就会及时赶到那儿。

The cat will scratch you if you pull her tail.如果你拉猫的尾巴,它就会抓你。

2.if 从句用一般现在时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted.如果雾在大一些,飞机可能就会改在别的机场降落。

If it stops snowing we can go out.如果雪停了,我们就可以出去。

3.if 从句用一般现在时,主句用must/shouldIf you want to lose weight you must/should eat less bread.如果你想减肥,你必须少吃面包。

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Look and say
If I’m hungry,
I will_e_a_t_s_o_m__e__fo_o_d__.
If I’m tired,
I will__h_a_v_e_a__r_e_s_t __.
Look and say
If I’m ill, _I_w_i_l_l _s_e_e__a_d_o__c_to__r_.
如果你愿意等一会的话,我去告诉我妈妈你来了。
试比较下列句子: If you see him tomorrow ,give him this book . 如果你明天去看他,给他这本书。 If you will see him tomorrow ,give him this book . 如果你明天愿意去看他,给他这本书。
If it is sunny this weekend, I _w__o_n_’_t _w_a_t_c_h_t_e_le_v_i_s_io_n__.
practice
If you are free this weekend, what will you do ?
sleep
If I am free ,… watch TV
5.If you __te_l_l __(tell) them, they __w_o_n_’_t_b__e_li_e_ve_ (not,believe) you. 6 I __w_i_ll_s_t_a_y_(stay) at home,If it ___ra_i_n_s____( rain). 7.If it _d__o_e_s_n_’t_r_a_i_n_(not,rain) ,I __w__il_l _g_o__( go) out. 8. we _w__il_l _p_la_y___(play) football, If it is s_u__n_n_y____(sun) . 9.If she _b_e_c_o_m__e_s__(become) a star ,her parents __w_o_n_’_t_s_e_n__d_
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
If it is sunny this weekend, what will you do ?
If it is sunny this weekend, I __w_i_ll_p_l_a_y__ football with my classmates.
(C )2. Work hard if you ______ to get a good mark.
A. wanted B. wanting C. want D. will want
(A )3. --I want to know if you______ to the party tomorrow.
果不早点起床,上学就会迟到。
2. If I play games on it , it will go wrong .
如果我用它玩游戏,它就会坏掉。
3. If you finish the homework, you can go home. 如果你作业做完了就可以回家了。
4. If you want to lose weight you must/should eat less bread. 如果你想减肥,你必须少吃面包。 5.If you heat ice it turns to water. (也可用will turn) 如果把冰加热,它就会化成水。
if条件状语从句要用一般现在时。
What will you do if you’re happy?
❖ If I’m happy, I will _cl_a_p_m__y_h_a_n_d_s_. ❖ If I’m happy, I will _s_ta_m__p_m__y_f_e_e_t . ❖ If I’m happy, I will _n_o_d_m__y_h_e_a_d__. ❖ If I’m happy, I will __w_i_n_k_m__y__e_y_e_s_.
3. 如果主句是祈使句,从句同样要用一般现在时。
Don’t go and play football if you don’t finish your homework.
Please call me if he comes next Sunday.
4.表示假设,表示将会发生和可能发生的事,
或进行提醒警告。 If +句子(一般现在时),+主句(主语will/may/can) +动词)
If you finish your homework , you can go out and play. If I have enough money next year , I will go to travel .
5. 下列从句中的will不是将来时助动词,而是情态动词。 翻译为“愿意”。 If you will excuse me,I really must go to bed . 如果你能原谅我的话,我真的要睡觉了。 If you will wait a minute ,I’ll go and tell my mother that you are here .
If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
If条件句:条件句用于陈述语气,表示假设的情况可能发生,
其中 if 是“如果”的意思。
构 成
条件从句
主句
时 态
If+一般现在时 主语+shall/will+动词原形
例 句
If he comes,
he will take us to the zoo.
用法:
1. 如果主句是一般将来时,从句则用一般现在时。
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
If it rains(从句), I will stay at home. I’ll go with you if you don’t want to go alone(从句).
2.如果主句含有must, may, can 等情态动词,从句也要用
一般现在时。 If you drive too fast, you may have an accident. You must stop if the traffic is red.
3. If you boil water, it becomes steam.
4. If you feel tired, you must have a rest. 条件状语从句
语法1:if作为宾语从句 的引导词,引导宾语从 句。(是否)
语法2:if(如果)引 导的条件状语从句
❀ if 用于宾语从句中
(not,send) her away 10.He w__il_l _w_a_t_c_h_(watch) TV ,if he ___is___(be) free.
exercises
(B )1. Be careful, if you______ want to make mistakes.
A. won’t B. don’t C. didn’t D. not
if条件句歌诀
❖ if条件句不一般,几个要点记心间。 ❖ 条件句放在前,逗号要放句中间。 ❖ 条件句表可能,主句多用将来时; ❖ 条件句表事实,主句常用现在时。 ❖ if条件句有特点,现在时把将来替; ❖ 这个规则要牢记!
e.g.
1.If you don’t get up early, you will be late for school .你如
If从句 条件状语从句
What will I do if it is sunny this weekend?
Part1:If 的用法
1.I want to know if he will go to park with us. 宾语从句 2. We will have a picnic if it doesn’t rain.
If it is sunny this weekend, I__________.
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I _W__o_n_’_t _s_ta_y__a_t_h_o_m__e____.
1.If he__d_o_e_s_n_’t_d__o__ (not, do it ), I___w_i_ll_d_o____(do) it. 2.If you _a_r_e_ (be) late for school ,my teacher _w__il_l _b_e__(be) angry.
3 If she__w__in_s___ (win) the prize ,we _w_i_ll_b__e_(be) happy. 4.If I __d_o_n_’t_e_a_t_ (not,eat )so much ,I _w__il_l _g_e_t__(get) thi一般 whether 改为陈述句
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