They face up to the failure.They try to ___ what the trouble they had was.
问题描述：
They face up to the failure.They try to ___ what the trouble they had was.
这句话最后的had
两个动词
had后面接be应该变成been,怎么会是was呢
答
what 引导的是宾语从句,what the trouble they had was,这句是宾语从句,they had前面省掉了that,that引导的是定语从句,先行词是the trouble,也就是说 宾语从句里面有一个定语从句：the trouble (that）they had.was ...