He didn't know what was happening outside为什么用进行时
He didn't know what was happening outside,为什么happening是进行时?
He didn't know what was happening outside为什么用进行时
he didn't know what was happening outside 为什么用的是was happenin
he didn not know what was happening outside
I didn t know what was happening outside这句话中为什么happen加ing?
what is happening outside(用she didn't know 作主句)
it appeared that he didn't know what was happening=he()()to
再问一个 I didn·t know what was happening.同义句 I didn·t know what
''What is happening ouside?'' (用she didn't know作主语) She didn
I didn`t know what was the matter还是I didn`t know whatt he ma
一道初二英语单词填空He didn't know what was h__outside.(是不是用happen?)
He didn't know which hat was his.还是应该用:He didn't know which