_____Zhao hai today?Yes.It is hour.Just an hour ago.

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_____Zhao hai today?Yes.It is hour.Just an hour ago.
Do you know why he _____ this evening He told me he had an important meeting to attend.
为什么是have you seen; isn't coming,而不是did you see;wasn't coming
这个today请详细解释下
______ you ______ the editor at the airport?No,he ______ away before my arrival.
为什么这道题第一个空就不是Have.met而是did.meet呢?
When I was young,I ______ to school everyday.
为什么答案是was walking,而不是walked呢?
感谢你们的回答!

这个today是指今天.题目的意思是指向今天之内你看见赵海了没?
所以不是过去时,用isn't coming.而另一种问法是你今天看见过赵海没,强调的是已经见过他了没,所以是现在完成时,用have you seen.
第二题,注意动词meet ,也就是题目意思是你和编辑在机场碰面了没有,是碰面的动作,这个动作不是延续性动词,所以不用完成时,用did you see 比较符合.
第三题,was walking,强调的是那一段时间之中都是走路去上学,而不是某一次走路去上学过,所以用过去进行时.这种句子里面的be动词+doing是指那段时间内从事的活动~
楼主仔细体会一下就熟悉了,语感是很重要的.希望你越学越好哈.

( ) you( ) your homework?yes,I finished it an hour ago. ----___you___your homework?----Yes.I____it an hour ago. It ____ an hour ago .The road is wet.(rain). when ()it ()?(arrive) half an hour ago It started to rain an hour ago -___ you ____ the next yet?-Yes,I ___ it half an hour ago. Has he finished his homework yet?Yes,he _____ it an hour ago you your work yet?Yes,I it half an hour ago. ____you____your book yet?Yes,I____it an hour ago. _____you ____the newspaper yet?yes,i________it an hour ago —Have you had your supper?Yes.I ___ it an hour ago.填had还是hav We talked___half an hour ago