could have done 和 should have done的用法是否一样?
问题描述：
could have done 和 should have done的用法是否一样?
答
could have done ：过去本来能够做到（某事）却没有做.例如You could have finished your homework yesterday,but you played too much.should have done：过去本来应该做（某事）却没有做.例如：You should have be...