主語從句在復合句中做句子的主語。引導主語從句的詞有連詞that, whether; 連接代詞 who, what, which; 連接副詞 when, where, how, why等。接下來給大家羅列幾個經典的主語從句例句。

如：

What is needed for the space trip is careful preparation.

Whether wild life can be well protected is of great importance.

Who will go makes no differences.

Why dinosaurs died out remains a puzzle.

Which kind of food is the best is still not certain.

為了避免主語顯得過長，可以用it 作為句子的主語，把主語從句移到句子的末尾。如：

It hasn't been decided yet when the new restaurant will open.

It is not clear how gold was found there.

It is hard to understand why there is gravity.

It is a shame that you have to leave so soon.

以上就是英語主語從句學習內容的分享，希望可以給大在學習英語的過程中帶來幫助。

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