文档介绍：Period4 Grammar -- Predicative clauses and subject clauses
▇Goals
●To learn about the predicative clauses and subject can find such stuffs。
Notes
1。 “it” is used as the formal subject.
Sometimes it is put at the beginning of a sentence and used the formal subject while the real subject clause is put at the end, because in English people usually put long or complicated items towards the end of a sentence。 Therefore， it can also be called a
preparatory subject.（精品文档请下载）
1) It is clear/certain/likely/true/surprising that..。（精品文档请下载）
2) It is a pity/shame/good idea/ no wonder that..。
3） It is said/ reported/ believed/ known/ thought/ suggested that。。.（精品文档请下载）
4） It seems/ happens that。。。
eg： It happened that I went out last night。
It is said that China will win in the World Cup.
It seems strange that he should have said that。
It’s clear that we should do something to stop it。
2。 We can use whether to introduce a subject clause or predicative clause when the clause is a yes/ no question。 If not used at the beginning, we can also use if to introduce the subject clause。 We use whether or not, but not if or not; we use both whether..。 or not and if.。.or not。（精品文档请下载）
eg. Whether it is going to clear up keeps me wondering。（精品文档请下载）
Whether the meeting will be put off has not been decided.（精品文档请下载）
The question is whether they have so much money.
It's unknown whether /if he’s finished his new novel。（精品文档请下载）
It's under discussion whether / if we will go backpacking or not。（精品文档请下载）
3。 that and what
that doesn’t work as an element in the subject or predictive clause， but usually not omitted。 what must be an element of the clause.（精品文档请下载）
That he said so much was very encouraging。
What we can't get seems better than what we have。
What you described is quite different from what we see now。（精品文档请下载）
What troubles me is that I can’t learn all these English idioms by heart.（精品文档请下载）
The problem is that we don’t have enough money.
Energy i