if条件状语从句 课件好用

Water ________ (turn) into ice if you turns __________ (cool) it. cool If you ________ stand (stand) in the rain, you _________ (get) wet. get
1.-2.-3.-4.-5.-6.-7.-8.--
Look and say
If you get up late, you
will be late for school.
get up late
late for school
Look and say
If the telephone rings,
I will answer it.
ring
answer
Look and say
一、判断正误，如果有误，请更正
1. If you will do more exercise this summer, you will be very fit. will do → do 2. The candle burns , if you light it. 把逗号去掉
3. I will build many schools for the poor children if I win a billion dollars. 正确
Actions with possible results
• 读下列例句，总结if 的用法： • • • • • • • • 1.If he runs, he’ll get there in time. 如果他跑步去，就会及时赶到那。 2.He will help you if you ask him. 如果你请他帮忙，他会帮你的。 3.If you fail in the exam, you will let him down. 如果你考试失败了，你会让他失望的 4.If you get up late, you will be late for school. 如果你起床晚了，上课就会迟到。
a lot of money
a big house
If I have a lot of money, I will buy a big house.
Look and say
hard-working
get good grades
If she is hard-working, she will get good grades.
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
• 由例句我们可以知道： • 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以其产生的相 一般现在时态 主句用 关结果，从句用_____________, 一般将来时态 _______________.
(主将从现)
I ________(stay) at home if it _______ rains will stay (rain) tomorrow. If he ____________ doesn’t come (not come), I _____________ (go) swimming alone. will go
• 如果你站在雨里，就会淋湿。
• 4.If you drop a glass, it breaks. • 如果你把玻璃杯掉在地上，它就会碎。
• 由例句我们可以知道： • 如果if引导的条件句谈论的是一种 真理/ 客观事实 时，主句谓语动词便不用 ____________ 一般现在 时 shall/will+动词原形，而直接用_______ 的动词形式。
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 _____
b d g a h c f e
heat ice, it turns into 1. If you ___________________water. bursts if you stick a pin into 2. A balloon _____________________ it. cool steam, it turns into 3. If you ___________________water. melts if you heat 4. Metal _____________________it. if you put it into 5. Wood floats _________________water. breaks if you drop it. 6. A glass_________________
(C) 11. If it ______ sunny tomorrow, I ____ boating. A. is go B. will be, go C. is, will go D. will be, will go
( B) 12. -- what will you do if it ______ tomorrow, --I’ll stay at home and watch TV. A. rain B. rains C. will rain D. is raining
If sentences
If 引导的条件状语从句
If you cool water, it turns into ice. ① ②
if clause 从句பைடு நூலகம்
main clause 主句
if clause从句
main clause主句
• 1. If you heat metal, it melts. • 如果把金属加热，它就会融化。 从句 主句
If 的两个意思:
• If:
“如果” 引导条件状语从句
主现从现/主将从现
I will go to the cinema if it doesn’t rain.
“是否”引导宾语从句
I don’t know if he will come tomorrow. if可用将来时
If 引导的条件状语从句不用将来时，意思 为“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 ____________ doesn’t rain (rain) tomorrow. Ben wants to know if it___________ will be (be) fine tomorrow. 是否
Look and say
sunny this Sunday
go fishing .
If it is sunny this Sunday, I’ll go fishing .
P105 B
• William has five problems • Give him some advice from column A and B • 1 I sometimes forget to take the right book to school. • If you check your timetable every night , you’ll know which books to take.
Exercises :
4. Will you come and stay with us for a while if you ______ finish (finish) doing your homework? 5. Wang doesn’t know if there _________ will be (be) an English evening next week. 6. Mike asked me if we ___________ would ask (ask) any questions the next class. 7. We are going for picnic tomorrow. I’ll call B Wendy to make sure________. A why to start B when to start C what to start D which to start
一般现在时 时态) 主句和从句都用_____________( 客观事实 /普遍现象 因为if引导的条件句说的是 _____________ If you stand in the rain, you get wet.
Actions with definite results
• 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.
4. If you freeze water, it will turn into ice.
will turn → turns
5. My uncle visits the museum if he will have time. visits → will visit,
will have → has
11. He_______ will help (help) me with my maths if is he ____ (be) free. will come tomorrow. 12. I don’t know if Jim ________ If he comes _______, I will be very glad. (come) Tell (tell) her my telephone number if 13. _____ wants she ______(want) to know. will go is 14. If it ____ (be) sunny tomorrow, I ______ (go) boating. boil turns 15. If you ______ (boil) water, it _______ (turn) into steam. travel 16. You can ________ (travel) around the have world if you ________ (have) money.
• 2.Water turns into ice if you cool it. • 如果你冷却水，它就会变成冰。 主句 从句 用 （用/不用）逗号隔开 从句在主句前时，____ 当主句在前时，则____ 不用 （用/不用）逗号
If you drop a glass, it breaks.
If you heat ice, it melts.
(C) 13. If he ______, I ______ him the time. A. comes, tell B. will come, will tell C. comes, will tell D. will come, tell ( B) 14. If it ______, it ______cold. A. snows, will be B. snows, is C. will snow, will be D. will snow, is ( A)1 5. If you ______a stone into water, it ______. A. put, sinks B. put, will sink C. will put, sinks D. will put, will sink