高中英語(yǔ)module5grammar課件外研版選修6-閱讀頁(yè)
2024-12-07 17:00本頁(yè)面
【正文】 If they had been here, he would have been speaking to them. 三 .與將來(lái)的事實(shí)可能相反 從句： If + 主語(yǔ) + should (或 were) + 動(dòng)詞原形 +…… 主句 ：主語(yǔ) + would (could, should, might) + 動(dòng)詞原形 +…… If it should rain, the crops would be saved. If he were here, I would give him the books. 注意：如果動(dòng)作在進(jìn)行中，從句 (不是主句 )要用：“ If + 主語(yǔ) + 過(guò)去進(jìn) 行式動(dòng)詞 +…… If she were staying here now, I would let her ride my horse. 四 . 從句的 If 有時(shí)可省略，那么從句中 的動(dòng)詞 (were, had, should)就得移到 主語(yǔ)前面： 原句： If he had tried it, he could have done it. 去 If： Had he tried it, he could have done it. 五 . 有時(shí)虛擬條件句的從句和主句地動(dòng) 詞動(dòng)作時(shí)態(tài)會(huì)不一致： 1) 從句表示過(guò)去，主句表示將來(lái)： If they had started the early morning yesterday, they would be here now. 2)從句表示將來(lái)，主句表示過(guò)去： If I were not to make a preparation for my experiment this afternoon, I would have gone to see the film with you last night. 3) 從句表示過(guò)去，主句表示將來(lái)： If we hadn39。t dare to do the experiment next week. 4)從句表示將來(lái)，主句表示現(xiàn)在： If we shouldn3
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