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if從句用一般現(xiàn)在時,主句用一般將來時 . If he runs he’ll get there in time. 如果他用跑的,他就會及時趕到那兒。. The cat will scratch you if you pull her tail. 如果你拉貓的尾巴,它就會抓你。2.if從句用一般現(xiàn)在時,主句用may/might/can. If the fog gets thicker the plane may/might be diverted. 如果霧在大一些,飛機可能就會改在別的機場降落。. If it stops snowing we can go out. 如果雪停了,我們就可以出去。3.if從句用一般現(xiàn)在時,主句用must/should. If you want to lose weight you must/should eat less bread. 如果你想減肥,你必須少吃面包。4.if從句用一般現(xiàn)在時,主句用一般現(xiàn)在時. If you heat ice it turns to water. (也可用will turn)如果把冰加熱,它就會化成水。5.if從句用現(xiàn)在進行時,主句用一般將來時. If you are looking for Peter you’ll find him upstairs. 如果你是在找彼得,上樓就會找到他。6.if從句用現(xiàn)在完成時,主句用一般將來時. If you have finished dinner I’ll ask the waiter for the bill. 如果你吃完了,我就叫服務(wù)生來算賬注意 :學(xué)習(xí) if 引導(dǎo)的條件狀語從句的用法,現(xiàn)在總結(jié)一下: if 條件句不一般,幾個要點記心間。 條件句,放在前,逗號要放句中間。 條件句表可能,主句多用將來時; 條件句表事實,主句常用現(xiàn)在時。在 if 引導(dǎo)的條件狀語從句中,如果從句談?wù)摰氖且粋€有可能發(fā)生的事實及其產(chǎn)生的相關(guān)的結(jié)果,主句用一般將來時態(tài),從句用一般現(xiàn)在時態(tài)。如: . We can walk there if we can39。t find a bus . . If it rains tomorrow ,we will not go to the zoo. . What will you do if you find a panda in danger.如果 if 條件句談?wù)摰氖侵貜?fù)發(fā)生和預(yù)示要發(fā)生的情景和事件,則主從句大多用一般現(xiàn)在時態(tài)。 . If bears are in danger ,they attack people.在 if 引導(dǎo)的條件狀語從句中,if 和條件句位置靈活,可直接放在主句后面,若 if 條件句放句首, 從句后面要加逗號,和主句隔開。還要注意前后時態(tài)一致原則【經(jīng)典練習(xí)】( )1. If you _____ to the party, you’ll have a great time. A. will go B. went C. go D. going( )2. It will be a long time ____ Peter _____ his work. , has finished B. after, finishes C. when, will finish D. before, finishes.( )3. What will father _____ us from Japan? A. take B. bring C. carry D. make ( )4. Weifang is famous ______ kites. A. for B. to C. on D. with( )5. I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks( )6. – What are you going to do tomorrow? We’ll go to the library tomorrow if it ___. A. isn’t rain B. rain C. won’t rain D. doesn’t rain( )7.—Do you know when he will e back tomorrow? Sorry, I don’t know. When he ____ back, I’ll tell you. A. es B. will e C. e D. may e ( )8. What will you do if you