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语法——情态动词Research findings show we spend about two hours drea

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语法——情态动词
Research findings show we spend about two hours dreaming every night,no matter what we ____have done during the day.
横线上填may,请解释语法并翻译.
为什么不能用 could?
语法——情态动词Research findings show we spend about two hours drea
may/might have done的意思是：可能做过某事,对发生的事的较不肯定的推测.
例如：
I haven't seen him for a long time.I am not sure what has happened to him.He might have gone abroad.
could have done有两重意思：1.本来能做,但没有做成；2.可能已经做了某事,对已发生的事情进行的较为肯定的推测.
这个句子的意思是：研究发现,不管我们白天可能做过什麽,我们每晚要做大约两个小时的梦.
1.Research findings show wo spend about two hours dreaming e We spend about two hours a day do our homework. 英语翻译用所给动词的适当形式填空1.Linda (spend)about two hours doing her hom Linda (spend) about two hours doing her homework every day. ----------- did you watch TV?—About two hours. —TV do you watch every day?--About two hours. We play volleyball for two hours.（two hours画线）(就画线部分提问) — — we have been there for about two hours. 高中英语语法：情态动词 Fiying there ___us about two hours是用cost还是spend I spend about two hours a day doing my homework的同义句 I spend about two hours a day doing my homowork划线部分提问