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If引導(dǎo)的句子◎If引導(dǎo)的條件狀語(yǔ)從句,從句用一般現(xiàn)在時(shí)態(tài),主句用將來(lái)時(shí)態(tài),今天小編就來(lái)說說關(guān)于if英語(yǔ)用法總結(jié)?下面更多詳細(xì)答案一起來(lái)看看吧!

if英語(yǔ)用法總結(jié)
If引導(dǎo)的句子
◎If引導(dǎo)的條件狀語(yǔ)從句,從句用一般現(xiàn)在時(shí)態(tài),主句用將來(lái)時(shí)態(tài)
If it is fine tomorrow I will go to the park.
◎if 引導(dǎo)的虛擬語(yǔ)氣
1.與現(xiàn)在事實(shí)相反:從句用過去時(shí)態(tài)(be動(dòng)詞一律用were)主句用would 動(dòng)詞原形
If you knew everything,you would not be so angry with him.
If i were you I would not be confident
2.與過去事實(shí)相反:從句用過去完成時(shí),主句用would 現(xiàn)在完成時(shí)
If I had known his telephone number,I would have telephoned him
練習(xí)
1.if a train entered this tunnel,it (draw)in fresh air behind it
2.if you had told me about it earlier,I (be able)to help you
3.if you (come)with us ,we would have been pleased
4.you (not make) such a mistake if you had been more careful
5.if father (be) alive,he would be horrified
6. If it (not rain )tomorrow,we will go there by bike.
7. If it is fine tomorrow ,I ( go) to the park.
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