would have done
would have done,could have done,should have done,need have done,must have done的用法及区别无
would have done本来要做的事却因为什么事而耽搁没有做,could have done本来能够做的事却没做,should have done本来应该做的事却没做 ,need have done有必要做的事却没做,must have done一定做过某事
must have done对过去的推测 would have done本来要做的事却没有做 could have done通常用与否定,表示对过去时态的推测 need have done通常用与否定,表示对做过的事没有必要. 这是我大四的时候老师讲的
答:could have done 本可以做而没有做, 能做而没有做 shuld have done 1。本应该做而没有做;2。猜测 1. You could ha...详情>>
答: 重视句子有效性和简洁性 在GMAT考试题目中,大家经常会看到对名词的状态性和动名词动作性的深入理解及名词词组核心词的辨认。而对动词时态的考查往往不是动作...详情>>
答:1.约翰•霍普金斯大学(Johns Hopkins University), GRE语文 161 2.范德堡大学(Vanderbilt University...详情>>