关于happen的用法
1.There are some policeman over there. What is ____ in the stree?
A.happeningB.happen
2.---What happens?
---I can not find my watch.
为什么是happens不是happend?
3.有There be happening这个用法吗?如果没有,应该是怎样?
4.——We haven’t heard from Jane for a long time.
——What do you suppose____to her?
A.was happening B.to happen C.has happened D.having happened
这个选C.为什么不是B?不是有suppose to do吗?