happen 后边跟to do为什么不是to doing?happen为不及物动词 to应该是介词所以我认为应该是to doinghappen为不及物动词 to应该是介词所以我认为应该是happen to doing
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happen 后边跟to do为什么不是to doing?happen为不及物动词 to应该是介词所以我认为应该是to doinghappen为不及物动词 to应该是介词所以我认为应该是happen to doing
waste怎么用?后边跟不to do还是 doing
happen to do和happen to be doing 的区别?顺便分别解释下.我问的是happen to be doing 不是happen to doing~
问个关于happen的用法的问题.happen.不是happen to do sth.那么 碰巧去做,碰巧正做,和碰巧已做.是不是分别是happen to do,happen to doing,happen to have been?
happen to do or happen doing?
happen to do sth 中 happen 是不及物动词,为什么还能加不定式做宾语?
（英语）关于happen When he got off the train,it happened ___________.A.to rainB.to be rainingC.rainingD.to raining我选了A不是说happen to do sth.这里为什么选B不选A呢?
sb.happen to do sth.
We must do everything possible to prevent such things from___againA.happening B.to happen C.happen选什么为什么?
用happen to do和happen to sb.造句
These things do happen 为什么用do
what do you suppose _______to him?为什么是has happened不是to happen?
I think cooking is for moms(think不是跟to do的吗）为什么?
what do you think to happen there yesterday 中TO为什么Y要加?
happen to do sth什么意思
chance/happen/seem/appear/pretend to do
happen to do sth的汉语是什么?
happen to do和happen to be doing有什么区别?区别是?HAPPEN TO BE DOING加的是进行时是吗?那是不是不能加结束性动词（短暂动词）了