主語從句和同位語(更新版)
【正文】 must be proved that… 必須指出……類似的過去分詞還有：known。 quite。It is a mystery to me how it all happened.It is mon knowledge that the whale is not a fish.It is no surprise that Bob should have won the game. b It is +形容詞+從句It is necessary that … 有必要……；It is clear that … 很清楚……；It is likely that … 很可能……；It is important that … 重要的是……類似的形容詞還有：strange。Whether we will hold a party in the open air tomorrow depends on the weather. Whether she is ing or not doesn’t matter too much.（2） 用連接代詞引導(dǎo)的主語從句 在由連接代詞who, whose, whom, which, what, whoever, whomever, whichever, whatever引導(dǎo)的名詞性從句中，其連接代詞在句中起名詞性作用，擔當一定成分.例如：What you need is more practice. Whatever we do is to serve the people.注：whatever / whoever的功用whatever, whoever在主語從句中不含疑問意義。注意：引導(dǎo)主語從句，不能用if不能在開頭，只能用whether。這分四種情況：(1) 對于以連詞that引導(dǎo)的主語從句，通常用形式主語it替代主語從句：a It is +名詞+從句It is a fact that… 事實是……；It is good news that … ……是好消息；It is a question that … ……是個問題；It is mon knowledge that … ……是常識類似的名詞還有：a pity；a wonder；a good thing； no wonder； surprise等。 unlikely。 astonishing, etc.It is doubtful whether she will be able to e.It is essential that he should be here by the weekend.It seems obvious that we can not go on like this.It is necessary that you （should）master the puter. 需要注意的是這類主語從句中，謂語動詞很多為“（should）＋動詞原形”，即要用虛擬語氣。 discussed。(3) 對關(guān)系代詞型what引導(dǎo)的主語從句，通常直接將主語從句放在句首。同位語從句一般用that, whether，what, which, who, when, where, why, how 等詞引導(dǎo)，常放在fact, news, idea, truth, hope, problem, information, wish,promise, answer, evidence, report, explanation, suggestion, conclusion等抽象名詞后面，說明該名詞的具體內(nèi)容。（if不能引導(dǎo)同位語從句） 例：We39。 C. this 16
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