【精讲精练】if引导的从句(共33张PPT)
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if-的用法PPT课件
1. If they had started earlier,they would have arrived in time. 要是他们早些有时可省略,然后将主 语与所用的限定动词(尤其是were,had,should) 倒置。
1. Should it (=if it should)be necessary,I will go. 倘若有必要,我会去的。 2. Were I(=if I were) in your place,I would do the same. 如果我处于你的位置,我也会这样干的5
C 虽引导宾语从句,但为了强调宾语部分,也
可把从句放在句首,此时只用whether不用if。 Whether he will come I am not sure. 他是不是来我拿不准。
D 从句作介词宾语时只用whether不用if。
It depends on whether it will be fine.那 得看是不是晴天。
四、if引导时间状语从句,当if做“当”或 “无论何时”解而不含有条件之义时,if从句 中的时态与主句中的时态相同。
1. If you mix yellow and blue,you get green. 你将黄色与蓝色混合,便会得到绿色。 2. If she wants the servant,she rings the bell. 每当她需要仆人时,她便按铃。
A. too many B. many too C. too much D. much too
10. I’ll give the book to him if he _B__ here next Sunday.
E 作discuss等动词的宾语时,用whether不
用if。
1. Should it (=if it should)be necessary,I will go. 倘若有必要,我会去的。 2. Were I(=if I were) in your place,I would do the same. 如果我处于你的位置,我也会这样干的5
C 虽引导宾语从句,但为了强调宾语部分,也
可把从句放在句首,此时只用whether不用if。 Whether he will come I am not sure. 他是不是来我拿不准。
D 从句作介词宾语时只用whether不用if。
It depends on whether it will be fine.那 得看是不是晴天。
四、if引导时间状语从句,当if做“当”或 “无论何时”解而不含有条件之义时,if从句 中的时态与主句中的时态相同。
1. If you mix yellow and blue,you get green. 你将黄色与蓝色混合,便会得到绿色。 2. If she wants the servant,she rings the bell. 每当她需要仆人时,她便按铃。
A. too many B. many too C. too much D. much too
10. I’ll give the book to him if he _B__ here next Sunday.
E 作discuss等动词的宾语时,用whether不
用if。
高考英语if条件状语从句课件(共34张PPT)
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. 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)
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
If 条件状语从句(1)
句型结构
祈使句+if条件状语从句 if条件状语从句,+祈使句(从句后加逗号)
时态
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》课件
if条件状语从句的基本用法
1 表达假设
if条件状语从句常用于表达假设,描述可能发生的情况。
2 引导结果
if条件状语从句还可以引导结果,说明由于某种条件发生,造成了一种结果。
if条件状语从句和现在时态的连用
一般现在时
if条件状语从句与一般现在时连用,表示一种普 遍真实的情况。
现在进行时
if条件状语从句与现在进行时连用,表示正在发 生的动作或状态。
3
练习三
根据上下文补全句子:I will go to the party if I ______ an invitation.
if条件状语从句中的注意事项
1 逗号的使用
2 否定形式
当if条件状语从句位于主句之前时,两者之间 可以用逗号隔开。
if条件状语从句中使用否定形式时,主句的谓 语动词要变为肯定形式。
if条件状语从句的常见练习
1
练习一
完成以下句子:如果我明天有时间,我______。
2
练习二ቤተ መጻሕፍቲ ባይዱ
选择正确的if条件状语从句:______ it rains, we will stay at home.
《if条件状语从句》PPT 课件
欢迎来到《if条件状语从句》PPT课件!在本课程中,我们将探讨if条件状语 从句的定义、结构以及各种用法,让您轻松掌握这一重要语法知识点。
if条件状语从句的定义和结构
if条件状语从句是指描述某种情况下,另一种情况会发生的句子结构。它由一 个if引导,并包含一个主句和一个从句。
if条件状语从句和过去时态的连用
一般过去时
if条件状语从句与一般过去时连用,表示过去某个时 间或条件下的情况。
过去进行时
if的用法总结及例句PPT
与“in case”的联系
in case可引导目的状语从句,相当于if引导的条件状语 从句。例如:“Take an umbrella in case it rains.”( 带把伞以防下雨。)
熟练运用if在固定短语和句型中应用
“If only”句型
表示对现在或将来的虚拟假设, 通常用于表达遗憾或愿望。例如 :“If only I had more time, I could finish the project.”(要 是我有更多的时间,我就能完成 这个项目了。)
典型例句
01
If it rains tomorrow, we will stay at home.(如果 明天下雨,我们就呆在家里。)
02
If I were you, I would take the job.(如果我是你 ,我就会接受这份工作。)
03
If he had known the answer, he would have told me.(如果他知道答案,他就会告诉我。)
功能
用于表达在某种条件下会产生的结果 或采取的行动。
结构特点
01
if从句+主句
if引导的条件状语从句通常位于 主句之前,由if引导,后面紧跟 主句。
时态呼应
02
03
虚拟语气
if从句中的时态通常与主句中的 时态相呼应,表达相应的假设条 件。
在if引导的虚拟条件句中,从句 和主句的时态往往采用虚拟语气 ,表达与事实相反的情况。
“As if/though”句 型
引导方式状语从句,表示比喻或 虚拟的情况。例如:“She speaks English as if she were a native speaker.”(她说英语就 像以英语为母语的人一样。)
If引导的条件状语从句精品PPT课件
主从句的区分
Eg:
1) I will bring an umbrella if it rains outside.
2) If the car is red, I will buy two.
3) If the ground is dry, we will play football this afternoon.
Choose the best answer
1. If Mary ____ (wan at once.
A. want , give B. wants, give C. wants, gives D. want, gives 2. If Tony ___ (have) time, ____(go) shopping with
If引导的状语从句之 主将从现 看下面的句子, If you can come here, bring me a book. 表示的是一种可能的情况。在这个句子中, 主句用祈使句,从句用一般现在时态。可 是如果句子说,“如果你不能来,我会自 己去取”,该怎么表达呢?
If引导的条件状语从句
大庆市第51
If在状语从句中的位置
If引导的条件状语从句,如下列的例子: 1) If you know the answer, please tell me. 2) If they come here, we will pick them up. 3) She will send me an email if I notice her. * 由此可以看出,if引导的句子放在句首,
him. A. have, go B. has, go C. has, goes D. have, goes 3. __ (remember) all the words if he ___(find) the
if条件状语从句复习-自己上课课件课件PPT
if条件状语从句复习
• if条件状语从句的定义和结构 • if条件状语从句的时态 • if条件状语从句的用法 • if条件状语从句的注意事项 • if条件状语从句的练习与巩固
01
if条件状语从句的定义和结构
定义
总结词
if条件状语从句是一种表示假设条件 的从句,通常用于描述在某种条件下 某件事情会发生或不会发生。
总结词
表示过去的条件或假设。
详细描述
If条件状语从句的过去时态通常用于表示过去的条件或假设,主句和从句的谓语动词 通常使用一般过去时。例如,“If he had known the answer, he would have told you.”(如果他当时知道答案,他就会告诉你。)
将来时态
总结词
详细描述
if条件状语从句是英语语法中的一种重 要从句类型,它通常以“if”作为引导 词,后面跟随一个表示条件的子句, 再接着是一个表示结果的子句。
结构
总结词
if条件状语从句的结构包括引导词“if” 、条件子句和结果子句三部分。
VS
详细描述
if条件状语从句的结构通常为“if+条件子 句(用一般现在时表示),则+结果子句”。 例如,“If it rains tomorrow, we will stay at home.”(如果明天下雨,我们就 会待在家里。)在这个例子中,“if it rains tomorrow”是条件子句,“we will stay at home”是结果子句。
02
if条件状语从句的时态
现在时态
总结词
表示当前存在的条件或假设。
详细描述
If条件状语从句的现在时态通常用于表示当前存在的条件或假设,主句和从句的 谓语动词通常使用一般现在时。例如,“If you study hard, you will succeed.” (如果你努力学习,你就会成功。)
• if条件状语从句的定义和结构 • if条件状语从句的时态 • if条件状语从句的用法 • if条件状语从句的注意事项 • if条件状语从句的练习与巩固
01
if条件状语从句的定义和结构
定义
总结词
if条件状语从句是一种表示假设条件 的从句,通常用于描述在某种条件下 某件事情会发生或不会发生。
总结词
表示过去的条件或假设。
详细描述
If条件状语从句的过去时态通常用于表示过去的条件或假设,主句和从句的谓语动词 通常使用一般过去时。例如,“If he had known the answer, he would have told you.”(如果他当时知道答案,他就会告诉你。)
将来时态
总结词
详细描述
if条件状语从句是英语语法中的一种重 要从句类型,它通常以“if”作为引导 词,后面跟随一个表示条件的子句, 再接着是一个表示结果的子句。
结构
总结词
if条件状语从句的结构包括引导词“if” 、条件子句和结果子句三部分。
VS
详细描述
if条件状语从句的结构通常为“if+条件子 句(用一般现在时表示),则+结果子句”。 例如,“If it rains tomorrow, we will stay at home.”(如果明天下雨,我们就 会待在家里。)在这个例子中,“if it rains tomorrow”是条件子句,“we will stay at home”是结果子句。
02
if条件状语从句的时态
现在时态
总结词
表示当前存在的条件或假设。
详细描述
If条件状语从句的现在时态通常用于表示当前存在的条件或假设,主句和从句的 谓语动词通常使用一般现在时。例如,“If you study hard, you will succeed.” (如果你努力学习,你就会成功。)
if-的用法PPT课件
E 作discuss等动词的宾语时,用whether不
用if。
We discussed whether we should close the shop. 我们讨论是不是该关掉商店。
9
F 句子中有if引导的条件句,如再有表示“是否”
的宾语从句,用whether不用if。
He asked me whether I’d move to New York if I got the job. 他问我如果我得到那份工作是否会搬家到纽约。
1. If she’s poor,at least she’s honest. 虽说她很穷,但至少她还是诚实的。 2. If I am wrong,you are wrong, too. 即使说 我错了,那么你也不对。
2
三、if作为连词还可以引导宾语从句。引导宾语
从句时和whether意思相同。
1. Lily asked if / whether she liked it. 莉莉问她是否喜欢它。
G 容易产生歧义时用whether不用if来表示“是否”
。 Please let me know if you need help. 如果你需要帮 助请告诉我。或:请告诉我你是否需要帮助。对 比:Please let me know if you need help.请告诉我 你是否需要帮助。
C 虽引导宾语从句,但为了强调宾语部分,也
可把从句放在句首,此时只用whether不用if。 Whether he will come I am not sure. 他是不是来我拿不准。
D 从句作介词宾语时只用whether不用if。
It depends on whether it will be fine.那 得看是不是晴天。
用if。
We discussed whether we should close the shop. 我们讨论是不是该关掉商店。
9
F 句子中有if引导的条件句,如再有表示“是否”
的宾语从句,用whether不用if。
He asked me whether I’d move to New York if I got the job. 他问我如果我得到那份工作是否会搬家到纽约。
1. If she’s poor,at least she’s honest. 虽说她很穷,但至少她还是诚实的。 2. If I am wrong,you are wrong, too. 即使说 我错了,那么你也不对。
2
三、if作为连词还可以引导宾语从句。引导宾语
从句时和whether意思相同。
1. Lily asked if / whether she liked it. 莉莉问她是否喜欢它。
G 容易产生歧义时用whether不用if来表示“是否”
。 Please let me know if you need help. 如果你需要帮 助请告诉我。或:请告诉我你是否需要帮助。对 比:Please let me know if you need help.请告诉我 你是否需要帮助。
C 虽引导宾语从句,但为了强调宾语部分,也
可把从句放在句首,此时只用whether不用if。 Whether he will come I am not sure. 他是不是来我拿不准。
D 从句作介词宾语时只用whether不用if。
It depends on whether it will be fine.那 得看是不是晴天。
if条件状语从句-课件(共31张PPT)
hard-working
get good grades
If she is hard-working,
she will get good grades.
Look and say
sunny this Sunday
go fishing .
If it is sunny this Sunday, I’ll go fishing .
• 读下列例句,试着自己总结if 的用法:
• 1. If you heat metal, it melts. • 如果把金属加热,它就会融化。 • 2.Water turns into ice if you cool it. • 如果你冷却水,它就会变成冰。 • 3.If you stand in the rain, you get wet.
A if; Whether B whether; Whether
C if; That D if ; If
3. Please tell her my telephone number if she _____ (want) to know.
wants
4. Will you come and stay with us for a while if you
“如果”。
If 引导的宾语从句可以用将来时,意思为“是
否”。
如果
Betty will visit the History Museum if it __d_o_e_s_n_’_t_r_ai_n_ (rain) tomorrow.
Ben wants to know if it____w_il_l b_e____ (be) fine tomorrow.
P105 B
• William has five problems • Give him some advice from column A and B
get good grades
If she is hard-working,
she will get good grades.
Look and say
sunny this Sunday
go fishing .
If it is sunny this Sunday, I’ll go fishing .
• 读下列例句,试着自己总结if 的用法:
• 1. If you heat metal, it melts. • 如果把金属加热,它就会融化。 • 2.Water turns into ice if you cool it. • 如果你冷却水,它就会变成冰。 • 3.If you stand in the rain, you get wet.
A if; Whether B whether; Whether
C if; That D if ; If
3. Please tell her my telephone number if she _____ (want) to know.
wants
4. Will you come and stay with us for a while if you
“如果”。
If 引导的宾语从句可以用将来时,意思为“是
否”。
如果
Betty will visit the History Museum if it __d_o_e_s_n_’_t_r_ai_n_ (rain) tomorrow.
Ben wants to know if it____w_il_l b_e____ (be) fine tomorrow.
P105 B
• William has five problems • Give him some advice from column A and B
由if引导的条件状语从句PPT27页
21、要知道对好事的称颂过于夸大,也会招来人们的反感轻蔑和嫉妒。——培根 22、业精于勤,荒于嬉;行成于思,毁于随。——韩愈
23、一切节省,归根到底都归结为时间的节省。——马克思 24、意志命运往往背道而驰,决心到最后会全部推倒。——莎士比亚
25、学习是劳动,是充满思想的劳动。——乌申斯基
由if引导的条件状语从句•源自6、黄金时代是在我们的前面,而不在 我们的 后面。
•
7、心急吃不了热汤圆。
•
8、你可以很有个性,但某些时候请收 敛。
•
9、只为成功找方法,不为失败找借口 (蹩脚 的工人 总是说 工具不 好)。
•
10、只要下定决心克服恐惧,便几乎 能克服 任何恐 惧。因 为,请 记住, 除了在 脑海中 ,恐惧 无处藏 身。-- 戴尔. 卡耐基 。
谢谢!
初中英语if条件状语从句ppt课件
If she doesn’t exercise enough,
she will be heavier. 1.主将从现
可编辑课件PPT
7
If he cleans the room , he can get $10 from his mother .
If I watch TV late , I can’t get up early . If you get up late , you must take a bus to school .
8. If I _h_a_v_e_(have) much money in the future, I will travel all over the world.
可编辑课件PPT
11
1.用所给词的正确形式填空。 1.If youa_r_e (be) late, the teacher
will be angry. 2.He _w__il_l _b_e_c_o_m_e_(become) a soccer
可编辑课件PPT
10
5. If you _w__o_rk__(work) hard, your dream will come true.
6. If shes_t_u_d_ie_s_(study) hard, She will go to Beijing University.
7. If it _i_s_r_a_iny( rainy )tomorrow, I will play the piano.
give present, you are happy. I hope it won’t rain that day. ②
will be Because if it won’t rain, my little son will come, too. ③
if条件状语从句-课件
8. --- Would you please tell me____ C next? --- Think it over. You’ll find a good way. A when to do B how to do C what to do D where to do D If he ___, I 9. I don’t know if my uncle _____. will be very happy. A comes; will come B will come; will come C comes; comes D will come; comes C going to Shanghai. 10. Either you or I _____ Only one person may go there. A are B were C am D was
Look and say
If you get up late, you
will be late for school.
get up late
late for school
Байду номын сангаас
Look and say
If the telephone rings,
I will answer it.
ring
answer
Look and say
1. He will help me with my maths if he ____ D free. A was B will be C would be D is 2. I don’t know_____ D he will come tomorrow.____ he comes, I’ll tell you. A if; Whether B whether; Whether C if; That D if ; If 3. Please tell her my telephone number wants (want) to know. if she _____
初二if条件句 ppt课件
3.I’ll buy a computer if I _h_a_v_e__(have) enough
money.
4.You __w_o_n_’t__g_e_t (not get) nervous if you
_d_o___(do ) enough exercise.
6.I want to know if he __w_i_ll_c_o_m_e_(come)
16
3.主将从现
If I’m ill, _I__w_i_ll__s_e_e__a__d_o_c_t_o_r.
If I’m late, _I__w_i_ll__s_a_y__s_o_r_r_y__.
2020/10/28
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2020/10/28
If it rains tomorrow, I_w_i_ll__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_l_l .
3.I’ll buy a computer if I __h_a_v_e_(have) enough money.
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4.You _w_o_n_’t__ge_t(not get) nervous if you __d_o__(do ) enough exercise.
5.If she ___is_ (be) kind to me , I __w_o_n_’t__ar_g_u_e(not argue) with her.
If you feel tired, you must have a rest.
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2.主情从现
If you are ill, you should go to see a doctor.
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My dream
What will you be if you grow up?
A: What will you be if you grow up? B: I will be a teacher. A: Why? B: If I am a teacher, I will teach some children.
If I were one of those students, I would______________________________. answer most questions in every class answered most questions in every class If I_________________________________, more I would practice ___________. practiced more , I would ____________ learn better If I ______________ learned better If I _______________, … Writing in groups If I were a teacher/movie star/bird … 3-5 minutes
see will he _________(see) 2. Where _______ the film if he
has ___________(have) time?
are be be) 3. If there __________(be) fewer trees, there will ______(
unless = if...not 除非,若不, 除非在……的时候
You will not succeed unless you work hard. =If you don’t work hard, you will not succeed.
As soon as与what if用法
I will call you as soon as he arrives in Beijing. What if you do when he makes mistakes?
4. If you feel tired, you must have a rest.
条件状语从句
Part2:Unless的用法
You will fail to arrive there in time unless you start earlier. If you don’t start earlier, you will fail to arrive there in time.
man left, I won’t marry you.”
If 引导宾语从句
My dream
宾语从句
1.Can you tell me what your dream is?
2.I want to know if/whether she/he has a dream. (是否) 3.I asked her/him if/whether she/he had a dream. (是否)
Pair work
A: What will you be if you grow up? B: I will be a/an.... A: Why? B: If I am a/an..., I will ...
If 引导条件状语从句
If 引导条件状语从句
If I have enough money, I will
travel around the world.
=I will travel around the world if
I have enough money.
if 引导的条件状语从句
主将从现 祈使句 情态动词 I will sing a song if I am happy.
Don’t cross the road if the light is red.
由从属连词whether, if 引导的宾语从句
e.g.
1. I want to know
if (whether) he will go to the park with us . __________________________________
(他是否跟我们一起去公园) whether (if) he can come . 2. Ask him _____________________ (他是否能来)
You must stop if the traffic light is red.
语法1:if(如果)引导的条件状 语从句
Let’s do some exercises.
if引导的条件状语从句
一 .在正确的答案下划一条线。
1. Tina ( will go/go/goes) to Europe if she (will
pass/pass/passes) the exams . 2. If there (will be/ are/is) a car accident, they (will call/call/calls) 110 for help at once. 3. Don’t wait for me if I (am/ will be) late.
II. 按要求转换句型。 1. Does Mr. Brown enjoy living in China? Could you tell us?(改写句子) enjoys →Could you tell us _________ if/whether Mr. Brown ______ living in China? 2. Did Peter come here yesterday? Li Lei wants to know. (改为含宾语从句的复合句) if/whether Peter _________ came Li Lei wants to know _________ here yesterday.
分析试题特点及做题思路:
考连词---- 做题思路 分析句子--- 判断关系--- 选择正确的if的用法
考时态-----做题思路:
判断语境提供的时态特点--- 选择正确的时
态
Fill in the blankets with the proper form stay (stay) rains (rain) tomorrow, I will 1.If It______ ______
与or not 连用只能用whether
4. ____ he will come is not decided.
作主语只能用whether
Let’s do some exercises.
If引导的宾语从句练习题
B they have passed the exam. 1 I don't know ___ • what B. if C. when D. where A some food and drink with 2. The girls asked if they ____ them. A. took B. take C. takes D. will take B go and get some. 3 She asked Linda if___ A. could she B. she could C. she can D. she may D 4. I don't know _________ the day after tomorrow. A. when does he come B. how will he come C. if he comes D. whether he'll come
more pollution.
dress 4. He will ________(dress) more casually if he
doesn’t work ( not work) on weekends. _____________
Part1:If 的用法
1.I want to know if he will go to a park with us. 宾语从句 2. We will have a picnic if it doesn’t rain. 条件状语从句 3. Can you tell me if there will be a concert tomorrow? 宾语从句
If 与whether 的区别
1. I don’t know _____ he will come or not.
2. I don’t care of ______ he is handsome. 3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 介词后只能用whether
【精讲精练】
If引导的从句
A joke
A man liked a girl very much and asked if the
girl could marry him. But the girl didn’t agree.
She said ,“even if(即使) there is only one
Pair work
What would you do if you had a million dollars?
Teachers’ problems
Many students (In Grade 9) don’t like to answer teachers’ questions in class.
4.You must study if you (want/will want) good grades.
二、用所给词的适当形式填空