八年级上英语--If引导的条件状语从句讲课讲稿
Uni10 if 引导条件状语从句 课件 人教版英语八年级上册
Look and say
you
get up late
If you get up late, you’ll be late for school.
late for school
I我
If I have a lot of money, I will buy a big house.
Translation:
如果我有足够的钱，我就去环游世界。
If I have enough money, I will travel around the world.
=I will travel around the world if I have enough money.
Read and summarize 读下列例句，总结if的用法
If you study hard, you’ll pass the exam. =Study hard, and you’ll pass the exam.
If you don’t hurry up, you’ll be late. = Hurry up, or you will be late.
Please call me if he comes next Sunday.
用法三：主句是祈使句，从句 也要用一般现在时。 （主祈从现）
Exercises： 1.I _w_il_l _s_t_a_y_(stay ）at home if Lucy _co_m__e_s （come） tomorrow.
If you want to lose weight, you must eat less bread.
Unit 10 if 引导的条件状语从句课件2024-2025学年人教版英语八年级上册
If I am late, the teacher will be angry with me.
What will happen if your teacher is angry with you?
If the teacher is angry with me, I will be sad.
What will happen if you are sad? If I am sad, I will cry.
5. Don’t _c_r_o_s_s_ (cross) the road if the light _i_s_ (be) red.
6. If you _w__o_rk__ (work) really hard, you _w_i_l_l _b_e_ (be) famous and rich.
( ) Johnson won’t answer the phone if he ___________ the number. A. knew B. doesn’t know
If I study hard, I will go to Beijing University.
What will happen if you get up at 9:00 this morning ?
If I get up at 9:00, I will be late.
What will happen if you are late?
If you don’t go to the party, what will you do?
If I don’t go to the party, I will sleep at home.
人教版英语八年级上册 Unit10 Grammar if引导的条件状语从句 精品语法课件(共28张PPT)
哪一小组的同学举手最快，就 有优先选择的权利。答对的小组加一 分，答错不扣分。
eat 1、If you _____(eat) less, you'll be healthier. 2、If Tom studies _______(study) hard, he'll get good grades. are 3、If they will be kind to each other, they will are be happy.（改错）
If I am happy,I will smile.
If I_____(try) my best, I will try be better.
are If you ____(be) kind to others, others will be good to you. is If she ____(be) at home, I will play __________(play) with her.
（一）听录音，根据录音内容填空。
Conversation 1:If John wears Jeans to the party,the teacher _________ him in. won't let will be Conversation 2:If Sam stays at home,he _______ sorry. take a taxi to Conversation 3:Mark thinks if they ____ won't be late. the party,they _________ goes to the party with Conversation 4:If Alison ______ Karen and Anna,they __________ will have a great time.
初中英语：If引导的条件状语从句ppt课件
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
： 例句 如果交通指示灯是红的，你必须停下来等一等。
eg:If the traffic lights are red,you must stop and wait.
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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,
_h_e_’_ll_p_la_y__b_a_s_k_e_tb__a.ll
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Look and say
I will_e_a_t_s_o_m__e__fo_o_d__
if I’m hungry.
I will__h_a_v_e_a__r_e_s_t __
if I’m tired.
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位置：从句可放在主句之前或之后，但是放在主句之前须有
逗号隔开
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I won’t go to the party_u__n__less I am invited.
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→主句谓语中也可以用had better(not)do,提建议 例句：如果你想减肥，你最好锻炼。
eg:If you want to lose weight,you had better take some
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exercise.
八年级英语上册新目标 课件Unit 10辅导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含有if引导的条件状语从句的复合句表示假如有从句动作的发生，就会有主句动作的发生。
★通常情况下，如果主句用一般将来时，if引导的条件状语从句用一般现在时。
如：If he misses the last bus, he'll have to walk home.We'll have a party in the garden if the weather is good.★如果主句是祈使句或者主句的谓语部分含有情态动词，if引导的条件状语从句也常用一般现在时。
如：If anyone calls, tell them I'm very busy.If it rains, you can stay at home and relax.【链接】本单元我们还学了连词unless，可意为“除非；如果不”，通常可以和if ... not 互换使用。
如：He won't go to sleep unless you tell him a story.=He won't go to sleep if you don't tell him a story.【运用】含有if和unless引导的条件状语从句的复合句Ⅰ. 句型转换1. You will be in the museum. Don't talk loudly.(用if合并为含有条件状语从句的复合句，且从句在前)___________________________________________2. You will take more exercise next year. You will keep healthy.(用if合并为含有条件状语从句的复合句，且从句在后)___________________________________________3. You will work hard. You won't do well in your exam.(用unless合并为含有条件状语从句的复合句，且从句在前)___________________________________________4. Mary will be busy this afternoon. She will play with us.(用unless合并为含有条件状语从句的复合句，且从句在后)___________________________________________5. You can't go into the art club unless you are a student.(改为同义句)You can't go into the art club __________________.Ⅱ. 单项选择1.—Thank you for telling me so much knowledge (知识) about nature.—Don't mention it. __________ you have more questions, come to me any time.A. IfB. BecauseC. Though (2019 四川乐山)2.—The weather report says that it __________ tomorrow in most parts of Anshun city.—If it __________, the school sports meet will be canceled (将被取消).A. will rain; will rainB. will rain; rainsC. rains; will rainD. rains; rains (2019 贵州安顺)3. If I __________ a two-week holiday next year, I will take part in a short study tour (旅行) to Beijing University.A. tookB. takeC. will takeD. are taking (2019 湖北黄石)4. You mustn't drive a car on the road __________ you get a driver's license (驾照).A. unlessB. ifC. since (2019 湖南长沙)5. The pollution in the river is terrible! It will be cleaner _______ we take action (采取措施) now.A. thoughB. ifC. unlessD. until6. Mandy will work out the math problem __________ she gives up.A. ifB. becauseC. soD. unless答案Ⅰ. 1. If you are in the museum, don't talk loudly.2. You will keep healthy if you take more exercise next year.3. Unless you work hard, you won't do well in your exam.4. Mary will play with us unless she is busy this afternoon.5. if you aren't a studentⅡ. 1-6 ABBABD。
Unit10if条件状语从句课件人教版英语八年级上册
用法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。
She is going to walk to school.
Shes to school, she m__u_s_t_ _b_e_late.
用法3：如果主句是祈使句，从句同样要用一般现在时。
It will be sunny tomorrow.
Let’s have a trip tomorrow.
If it __is__ sunny tomorrow, Let’s __h_a_v_e_ a trip.
If引导条件状语从句，遵循：
主将从现 主祈从现 主情从现
一、用括号内所给单词的正确形式填空。 have
___________________________.
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I ___w_o_n_’_t_s_t_a_y__a_t_h_o__m_e__.
If it is sunny this weekend, I _w__o_n_’_t _w_a__tc_h__t_e_le__v_is_i_o_n_.
If I have time, I’ll go to see you. I’ll go to see you if I have time.
从主有逗 主从无逗
最常用的引导词有:
• if 如果 • unless (= if not) 除非 • as long as 只要
1. If you want to know, I can tell you.
英语中考语法复习
If条件状语从句
人教八上 Unit10 if条件状语从句专项讲解 课件
If we ask people to bring food, they'll just bring 4
potato chips and chocolate.
考向一 “主将从现”原则。 if引导条件状语从句时，主句是一个一般将来时 的句子，从句用一般现在时，我们称之为“主 将从现”原则。
考向二 if引导条件状语从句时，主句可以是含有must, may, can等情态动词的句子。
if引导宾语从句时，翻译为“是否”， 时态要根据句子具体情况而定。
Thanks for your listening
A. gets; misses
B. gets; will miss
C. will get; misses
D. will get; will miss
归纳总结： 1 在if引导的条件状语从句中，从句为一般现在时。
主句有三种形式：一般将来时、含有情态动词、祈使句。
2 if引导条件状语从句时，翻译为“如果”， 时态为一般现在时。
A. knew
B. will know
C. doesn’t know
D. didn’t know
2. —Celia, join us in the Super Summer Camp if it ___B____ this weekend.
—I’d love to. But nobody can know if it________ .【咸宁】【if引导状语从句】
我不知道明天他是否来学校。
（宾语从句）
★①判断从句成分(宾语/状语)
★②判断中文意思
★③时态根据句子具体情况分析
If you come to my home, I'll show you the photos.
if引导的条件状语从句教学课件
（2012黑龙江） 2.I’ll buy a computer if I _h_a_v_e__(have__w_o_n’_t _g_e_t _(not get) nervous if you _d_o___(do )
enough exercise.
还有其他连词可以引导条件状语 从句呢
1. as ( so ) long as…. “只要…， 就… ” 表示 一种前提条件
• You’ll succeed as (so ) long as ( if only ) you try hard.
• 只要你努力，你就会成功。 无忧PPT整理发布
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2．unless ．除非；若不；如果 不……；除非在……时候
If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
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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 __.
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If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
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2.If 从句 （一般现在时）， 主句 （ 一般现在时 ）
• 表示科学常识、事实、 经常性的动作或倾向 自动会发生的事
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八年级上英语--I f引导的条件状语从句13夏八年级英语语法专项 if引导的条件状语从句专项练习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。
If you ask him，he will help you．如果你请他帮忙，他会帮你的。
If you have finished the homework， you can go home．如果你作业做完了就可以回家了。
另外，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。
1.if引导的条件状语从句：表示在某种条件下某事很可能发生。
If we pay much attention to the earth, we'll have a better world.如果我们多关爱地球，就会拥有一个更美好的世界If it rains tomorrow, what shall we do?如果明天下雨，我们怎么办？注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。
What would happen if there were no water ?如果没有水会怎样？2.unless引导的条件状语从句：unless的意思是如果不，除非。
可与if...not互换。
You will fail in English unless you work hard.你英语考试会不及格的，除非你更加努力。
3.as /so long as引导的条件状语从句：as /so long as意思是“只要”So long as you're happy,i will be happy.只要你高兴，我就高兴。
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。
4．if从句用一般现在时，主句用一般现在时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。
5．if从句用现在进行时，主句用一般将来时If you are l ooking for Peter you’ll find him upstairs. 如果你是在找彼得，上楼就会找到他。
6．if从句用现在完成时，主句用一般将来时If you have finished dinner I’ll ask the waiter for the bill. 如果你吃完了，我就叫服务生来算账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。
条件句表真实，主将从现要遵从；条件句非真实，虚拟语气用到位。
备注：在 if 引导的条件状语从句中，if 和条件句位置灵活，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。
还要注意前后时态一致原则。
if引导的条件状语从句专项练习Ⅰ.单项选择（）1.If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going（）2. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks（）3. – 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 rain（）4. What will you do if you _____ to the old folk’s home?A. goB. wentC. goingD. will go（）5．I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. cameⅡ.用所给词的适当形式填空6..If you ________(feel) tired, you _______________ (have) to have a rest.7. Where _______ he _________(see) the film if he ________________(have) time?8. If there __________(be) fewer trees, there _______________( be) more pollution.9. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot.11. Lana ________________( buy) a new dress if the old one ____________(be) out of style.12.The twins ______________(fight) if they_______________(argue).13. I ____________(have) a bake sale if I _____________(need) money for education.14. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain.15. I ____________(go) to the beach if it________________ ( not rain) this week.17. __________they __________( have) a match if the P.E. teacher _____________(be) busy?18. If she ____________(get) up late, she _____________ ( not catch) the early bus.Ⅲ.翻译下列句子19..如果他到的晚了会发生什么事情？What _______________ if he _____________ late?20. 如果努力学习，你就会取得好成绩。
If you__________ _________, you good marks.21. 他如果看电视太久了，他的父母会不高兴。
If he _________ TV too much, his parents __________ __________ unhappy.22. 如果我们为他组织生日聚会，大家都会来的。
Everyone ________________ if we _____________ a birthday party __________ him.23. 如果明天不下雨，我会和你一起去公园的。
If it __________ __________ tomorrow, I ______________ go to the park _________ you.24. 如果她睡过头了，就会旅游迟到的。
She;__________________________ the trip if she ___________________.25. 如果他有空，他会帮助你的。
If he _________________, he _________________ you.26. 如果Tom考试不及格，他就没有机会上高中了。
Tom _________have the ________to go to the ________high school if he ________ the exams.。