中考英語(yǔ)專題復(fù)習(xí)：條件狀語(yǔ)從句(文件)
【正文】 leaving.4. Leave without me if I don’t phone.5. You can’t send a letter if you don’t know the address.6. You can’t go in unless you are a member.7. Don’t include them unless they reply.有所給詞的適當(dāng)形式填空。t be afraid of asking for help ____ it is needed. A. unless B. since C. although D. when 13. I would appreciate it ____ you call back this afternoon for the doctor39。但有些句子,雖沒有含條件關(guān)系的連詞,卻也隱含著條件關(guān)系,這些句子常用一些詞,如but for, without等引出一個(gè)介詞結(jié)構(gòu)來(lái)表示條件,條件常常是虛擬的,或與事實(shí)相反的假設(shè)?！ e will sign the contract provided we offer more favorable ,他就會(huì)在合同上簽字?！ ou can go swimming on condition (that) you don39?！ ?. unless ,若不,除非在……的時(shí)候 You will fail to arrive there in time unless you start ,你就不能及時(shí)趕到那兒。I will buy a DVD set if necessary.必要的話，我就買一臺(tái)DVD。如: If the policeman had arrived earlier, he would have seen the accident. 要是警察更早些到達(dá)，他就能見到事故了。 Jean doesn39。(1)表示與現(xiàn)在的情況相反，或?qū)?lái)實(shí)現(xiàn)的可能性很小，if從句用過(guò)去式（動(dòng)詞be多用were這個(gè)形式），主句用“would／should／could／might＋動(dòng)詞原形”?！纠縄 will e to see you if I have time.我有時(shí)間，我就來(lái)看你。s go out for a walk unless you are too tired. 如果你不累的話讓我們出去走走。條件狀語(yǔ)從句我們知道,引導(dǎo)條件狀語(yǔ)從句最常用的連詞是if, 由if引導(dǎo)的條件狀語(yǔ)從句表示在某種條件下某事很可能發(fā)生。unless = if not. Let39。學(xué)習(xí)條件狀語(yǔ)從句應(yīng)注意以下幾點(diǎn)：（1）條件狀語(yǔ)從句中一般不使用將來(lái)時(shí)態(tài)，盡管主句使用將來(lái)時(shí)態(tài)，而主句用一般現(xiàn)在時(shí)或現(xiàn)在完成時(shí)?！纠縄f I were to I should first of all get the experts to discuss the plan.如果我真的想做這事，我首先會(huì)找專家們討論我的計(jì)劃。 在表示將來(lái)情況的虛擬條件句中，還可以用“were＋to 不定式”或“should＋動(dòng)詞原形”。(, B對(duì)） ( 2) 表示與過(guò)去的事實(shí)相反，從句用過(guò)去完成時(shí)，主句用“would／should／could／might＋have＋過(guò)去分詞”?！纠緾ome
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