2020屆高考英語名詞性從句語法復習
that’s just what i want. 這正是我想要的。
this is where our problem lies. 這就是我們的問題所在。
that is why he didn’t come to the meeting. 那就是他為什么不到會的原因。
it looks as if it is going to rain. 看上去天要下雨了。
需要注意的，當主語是reason時，表語從句要用that引導而不是because。例如：
the reason why he was late was that he missed the train by one minute this morning .
【注意】whether 可引導表語從句，但與之同義的if卻通常不用于引導表語從句。
2、簡介
定義：a 表語從句就是用一個句子作為表語。說明主語是什么或者怎么[1]樣，由名詞、形容詞或相當于名詞或形容詞的詞或短語充當，和連系動詞一起構成謂語。
the problem is puzzling. 這問題令人困惑
主語 連系動詞 形容詞作表語
the problem is when we can get a pay rise. 問題是什么時候我們可以得到加薪.
主語 連系動詞 一個句子作表語---表語從句
b 連接表語從句的連接詞有：that, what, who, when, where, which, why, whether,how.
he has become a teacher. 他已經成為一名教師。
he has become what he wanted to be ten years ago. 他已經成為了他XX年前想成為的。
she has remained there for an hour. 她曾在那里停留了一個小時。
she has remained where i stood yesterday for an hour.她一直在我昨天站的地方站了一個小時。
his suggestion is good. 他的建議是好的。
his suggestion is that we should stay calm. 他的建議是，我們應該保持冷靜。
the question is confusing. 這個問題令人困惑.
the question is when he can arrive at the hotel. 問題是，他什么時候可以到達酒店。
who will travel with me to beijing tomorrow.誰與我明天將前往北京。
why he cried yesterday. 昨天他為什么哭。
how i can persuade her to join us in the party. 我怎么能說服她加入我們的派對。
whether the enemy is marching towards us. 是否敵人正向我們行進.
注意：
a 表語從句一定要用陳述語序。
false: the question is when can he arrive at the hotel.
right: the question is when he can arrive at the hotel.
b 不可以用if，而用whether 連接表語從句(as if 例外）。
引導賓語從句時可以互換if/whether 位于介詞后要用whether
位于句首時要用whether
引導表語從句，主語從句，同位語從句時要用whether
false: the question is if the enemy is marching towards us.
right: the question is whether the enemy is marching towards us.
right: it looked as if he had understood this question.
c 不像賓語從句，在有表語從句的復合句中，主句時態和從句時態可以不一致。
right: the question is who will travel with me to beijing tomorrow.