Someone must have taken it away this morning,___?为什么填didn't he Thankyou!
问题描述:
Someone must have taken it away this morning,___?为什么填didn't he Thankyou!
答
前肯定,后否定,这里没有戏词be所以用do not\ does not 或did not,根据时态(taken)确定用
过去时态did not ,Someone用单三形式,所以用he
答
因为这是表示推测的,推测的内容是过去的——即今早,
所以,要由意思,对过去时进行反问.
这种对过去情况表示推测的句子,有很多.
He must have left yesterday, didn't he?
他昨天一定走了,是吗?
It must have snowed yesterday, didn't it?
昨天一定下过雪,是吗?
You must have arrived yesterday, didn't you?
你一定是昨天到的,对吧?