这句是什么从句?ThatmeansthatpracticallyallAmericansalreadymusthavewhatineffectisanationalIDcard.其中that引导的是宾语从句,那么后面what引导的是什么从句?这句话总共有几个从句?

Question

这句是什么从句?
That means that practically all Americans already must have what in effect is a national ID card.
其中that引导的是宾语从句,那么后面what引导的是什么从句?这句话总共有几个从句?

Answer 1

1.That partically all Americans already must have what in effect is a national ID.整句为宾语从句.
2.(have) What in effect is a national ID.又一个宾语从句.（what是主语,is a national ID是谓语,遵循宾从中的主谓结构.）
3.what in effect(is a …)主语从句.