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英语翻译1.Documents(treat)___with chemicals will not become yell

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英语翻译
1.Documents(treat)___with chemicals will not become yellow with age.
2.I shall tell you what he(do)___at three o'clock yesterday aftertoon.答案是was doing,为什么不是did呢?
3.You are lucky (get)___a ticket to the show.
4.I have complated (write) ____my exercise at last.
5.If I were not to give a lecture tomorrow morning,I (go)____to the film already.
英语翻译1.Documents(treat)___with chemicals will not become yell
1. treated treated with chemicals=that are treated with chemicals
2. was doing 在过去某一特定时刻动作在发生,用过去进行时.
3.to have got be lucky to have done sth. 很幸运的.
4. writing complete doing sth 做完某事
5. would have gone(混合虚拟语气,要不是要作一演讲,将来时虚拟语气, would have gone与过去事实相反的虚拟语气.)
再问: 3.为什么要用完成时呢? 5.要去看电影不是明天要做的事吗 为什么是过去虚拟呢 麻烦你了 谢谢!
再答: 3. 根据句意;票已经得到了,故用不定式的完成式表完成。 5.根据句意: 要不是明天有一讲座(假设与将来不符)后半句意为:我本该早就去看电影了(与过去动作不符)already(已经)