英语主语从句求教：1：他们碰巧出席了2：我不了解的是,他为什么改变主意了3：他对我所说的话让我迷惑
3个回答

很高兴为你作答

1.It happened that he was present.一般来说主语从句都是放在句首.但有时为了使句子保持平衡,避免”头重脚轻”,常用it作形式主语,从而把主语从句放在后面.例如It is known

all /said/told/heard/ reported/decided/ suggested/advised/ ordered/thought/considered hoped… that.等等

2.what i did not understand is why he changes his mind

3.what he said to me makes me confused.

2和3 都可以用what引导的主语从句来表达

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