摘要:1. 名词从句在复合句中作主语. 1)连词that在句首不可省 2)用whether引导时不可用if. 3)主语从句位于句首.句子显得笨重.因此一般把它移到句子后面.前面用引导词“it 来作形式主语. eg. three people were killed in the traffic accident. 4)主语从句和强调句的判断:把It is / was-that去掉.句子意思还完整.是强调句,主语从句即使去掉it,将主语从句放在句首.连词that也不能拿掉.

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