Question

观察下列句子，试着归纳其画线部分所包含的句型结构。

1．She and her family hid away for twenty-five months years before they were discovered．(P2, Reading Para．2)

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2．I do want to change this situation, but I don’t know how．(P7, Letter)

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3．Mother asked her if(whether)she was very hot with so many clothes on．(P5, 6)

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Answer 1

答案：
解析：

1．before引导的时间状语从句。 　　2．do用于强调。 　　3．with＋宾语＋宾补，with的复合结构。