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      酷兔英語

      章節正文

      名詞性從句是由if, whether, that 和各種疑問詞充當連接詞所引導的從句,其功同名詞一樣。

      一.主語從句

          主語從句是在復合句中充當主語的從句,通常放在主句謂語動詞之前或由形式主語it代替,而本身放在句子末尾。

          1. It 作形式主語和it引導強調句的比較

          It 作形式主語代替主語從句,主要是為了平衡句子結構,主語從句的連接詞沒有變化。而it引導的強調句則是對句子某一部分進行強調,無論強調的是什么成分,都可用連詞that。被強調部分指人是也可用who/whom。例如:

          It is a pity that you didnt go to see the film.

          It doesnt interest me whether you succeed or not.

          It is in the morning that the murder took place.

          It is John that broke the window.

          2. it 作形式主語的結構

          (1) It is +名詞+從句

          It is a fact that                     事實是…

          It is an honor that                     …非常榮幸

          It is common knowledge that             …是常識

          (2) it is +形容詞+從句

          It is natural that                        很自然…

          It is strange that                        奇怪的是…

          (3) it is +不及物動詞+從句

          It seems that                           似乎…

       

          It happened that                        碰巧…


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