退时态:真实语气中的现在时变成过去时,过去时变成过去完成时,将来时变成过去将来时 1.条件句中: If it were not for…;If it hadn’t been for…这两种句型表示“要是没有”,相当于but for If it had not been for the PLA man, he would not be studying English now. if…only…(或If only…)表示“要是…就好了” 1.名词性从句: demand/suugest/order/insist/propose/request/ask/advise/prefer/command/desire that… They demanded that the aggressor troops (should) be withdrawn immediately. 由insist引导的宾语从句可以虚拟也可以不虚拟: He insisted that he was right.坚持认为 He insisted that we should agree with him.坚持某事 由suggest引导的宾语从句可以虚拟也可以不虚拟: His white face suggests that his not healthy.表明 He suggested that we have a rest.建议
If I could only see him once! If only I had listened to your advice. 很明显,这种句型省略了主句 2.其他状语从句中: as if/as though/even if… Tom looked sad as if he had heard bad news. I won’t lend you any money even I had money. 3.名词性从句: wish that…(hope后的宾语从句不虚拟) I wish I were as strong as you. How I wish it wasn’t raining! would rather/would sooner/had rather that…表示“宁愿” I would rather they came tomorrow. I could go myself but I would sooner you went. I had rather you told him than I did. It is time/high time that… It is time we went to bed. +(should) do: