what you said和what you have said有什么区别例如,i can not understand what you ( ).这里要用哪个?如果前面的can改成could呢?
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![what you said和what you have said有什么区别例如,i can not understand what you ( ).这里要用哪个?如果前面的can改成could呢?](/uploads/image/z/7287725-29-5.jpg?t=what+you+said%E5%92%8Cwhat+you+have+said%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%E4%BE%8B%E5%A6%82%2Ci+can+not+understand+what+you+%28+%29.%E8%BF%99%E9%87%8C%E8%A6%81%E7%94%A8%E5%93%AA%E4%B8%AA%3F%E5%A6%82%E6%9E%9C%E5%89%8D%E9%9D%A2%E7%9A%84can%E6%94%B9%E6%88%90could%E5%91%A2%3F)
what you said和what you have said有什么区别例如,i can not understand what you ( ).这里要用哪个?如果前面的can改成could呢?
what you said和what you have said有什么区别
例如,i can not understand what you ( ).这里要用哪个?如果前面的can改成could呢?
what you said和what you have said有什么区别例如,i can not understand what you ( ).这里要用哪个?如果前面的can改成could呢?
就是过去式和现在完成时的区别.
what you said 过去时是过去某一时间里所发生或存在的状态.
what you have said现在完成时跨越两个时间以上,一是过去,一是现在.它的动作发生在过去,但是对现在又影响.
i can not understand what you said.
i could not understand what you have said.