2. 当由一般疑问句充当宾语从句时,用if或whether引导,意为“是否”。 (1) Is it an interesting novel? I don’t know. I don’t know if /whether it is an interesting. (2) Does Cathy go to school early? Do you know? Do you know if /whether Cathy goes to sc...
when是必然发生(will happen);if是可能发生(might happen) 例句: I'll take care of it when I am free this afternoon. (今天下午我有时间,我会处理。)→一定有时间 I'll take care of...
从属连词: that, whether, if 不充当从句的任何成分 连接代词: what, whatever, who, whoever, whom, whose, which, whichever. (作主、宾、表、补) 连接副词: when, where, how, why, however, wherever(状) 主语从句的用法 一、主语从句在复合句中作主语, 它可 ...
[解析]D､C｡引导名词性从句的从属连词that与whether的区别是:句子成分完整且表意确定时选用that连接,句意不确定时选用whether/if连接;借助it,将真正主语或宾语后置,构成“It…that”句型,但whether/if不可;下列情形用whether不用if:与or not 连用,中间无其他词隔开;...
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