精选优质文档-----倾情为你奉上虚拟语气大杂烩类别用法例句If引导的条件从句与现在事实相反从句动词：过去式（be用were）主句动词：should/would/could/might+动词原形If he were here, he would help us.与过去事实相反从句动词：had+过去分词主句动词：should/would/could/might +have+过去分词If I had been free, I would have visited you.与将来事实相反从句动词：过去式 / should+动词原形 / were+不定式主句动词：should/would/could/might+动词原形If it should rain tomorrow, we would not go camping.“should+动词原形”类表示“坚持、命令、要求、建议”的demand, suggest, order, insist后接的从句中动词为should+动词原形He suggested that we not change our mind.在It is necessary / important that等从句中，谓语动词用should+动词原形It is necessary that we should apply theories to practice.It is time that…句型中动词用过去式或should+动词原形It’s high time that we left. 现在---did/were 过去---had done 类 将来---could/would dowish后的从句中分别用过去式，过去完成式和could/would+动词原形表示与现在，过去和将来情况相反 I wish I could be a pop singer.as if引导的状语从句中动词用过去式或过去完成式和could/would+动词原形,表示与现在，过去和将来情况相反 They are talking as if they had been friends for years.If only句型中动词常用过去式,或者过去完成式和could/would+动词原形，表示强烈的愿望If only our dream had come true!would rather所接的从句中动词用过去式,或者过去完成式I would rather you stayed at home now.练习：1. 如果出国，我会去美国。
2. 如果他要是抓紧点，他就赶上火车了3. 我真希望昨晚参加了的朋友生日宴会4. 真希望知道他现在在哪里5. 他坚持说我们应该立刻出发6. 我们有必要现在去散散步7. 我们悉心照料病患是很重要的8. 我宁愿你没有那样对待那个乞丐9. 我宁愿不认识你10. 到了该上学的时候了11. 他对待那个男孩好像是自己的孩子一样12. 那时，他说的像是知道了那件事一样13. 我要是昨天看了那部电影就好了！14. 我要是和他一样强壮就好了！练习：1. 如果出国，我会去美国If I went abroad, I would/could/should/might go to America.2. 如果他要是抓紧点，他就赶上火车了If he had hurried, he would/could/should/might have caught the train.3. 我真希望昨晚参加了的朋友生日宴会I wish I had attended my friend’s birthday party last night.4. 真希望知道他现在在哪里I wish I knew where she is.5. 教授建议我们多做些阅读。
The professor suggested/advised/proposed/recommended that we (should) do more reading.6. 他坚持说我们应该立刻出发He insisted that we (should) set off at once.7. 我们有必要现在去散散步It’s necessary that we should have a walk now8. 我们悉心照料病患是很重要的It’s important that we should take good care of the patient.9. 我宁愿你没有那样对待那个乞丐I would rather you hadn’t treated the beggar like that.10. 我宁愿不认识你I would rather I didn’t know you.11. 到了该上学的时候了It is (high) time that you went / should go to school. 12. 他对待那个男孩好像是自己的孩子一样He treats the boy as if he were his own son.13. 那时，他说的像是知道了那件事一样。
He spoke as if he had known about it.14. 我要是昨天看了那部电影就好了！If only I had seen the film yesterday!15. 我要是和他一样强壮就好了！If only I were as strong as him!专心---专注---专业。