摘要：高考復(fù)習(xí)就像是一場持久戰(zhàn)，我們不僅要制定好大的戰(zhàn)略，針對每一場戰(zhàn)役更要制定好相應(yīng)的戰(zhàn)術(shù)。2014高考歷史如何復(fù)習(xí)?下面是“高中英語一輪復(fù)習(xí)知識點(diǎn)：名詞性從句”歡迎大家點(diǎn)擊參考!
一.主語從句
主語從句是在復(fù)合句中充當(dāng)主語的從句，通常放在主句謂語動(dòng)詞之前或由形式主語it代替，而本身放在句子末尾。
1. It 作形式主語和it引導(dǎo)強(qiáng)調(diào)句的比較。
It 作形式主語代替主語從句，主要是為了平衡句子結(jié)構(gòu)，主語從句的連接詞沒有變化。而it引導(dǎo)的強(qiáng)調(diào)句則是對句子某一部分進(jìn)行強(qiáng)調(diào)，無論強(qiáng)調(diào)的是什么成分，都可用連詞that。被強(qiáng)調(diào)部分指人是也可用who/whom。
例如：
It is a pity that you didn’t go to see the film.
It doesn’t interest me whether you succeed or not.
It is in the morning that the murder took place.
It is John that broke the window.
2. 用it 作形式主語的結(jié)構(gòu)。
(1) It is +名詞+從句
It is a fact that … 事實(shí)是…
It is an honor that …非常榮幸
It is common knowledge that …是常識
(2) it is +形容詞+從句
It is natural that… 很自然…
It is strange that… 奇怪的是…
(3) it is +不及物動(dòng)詞+從句
It seems that… 似乎…
It happened that… 碰巧…
(4) it +過去分詞+從句
It is reported that… 據(jù)報(bào)道…
It has been proved that… 已證實(shí)…
3. 主語從句不可位于句首的五種情況。
(1) if 引導(dǎo)的主語從句不可居于復(fù)合句句首。
(2) It is said ， (reported) …結(jié)構(gòu)中的主語從句不可提前。
例如：
It is said that President Jingo will visit our school next week. (right)
That President Jiang will visit our school next week is said. (wrong)
(3) It happens…， It occurs… 結(jié)構(gòu)中的主語從句不可提前。
例如：
It occurred to him that he failed in the examination. (right)
That he failed in the examination occurred to him. (wrong)
(4) It doesn’t matter how/whether …結(jié)構(gòu)中的主語從句不可提前。
例如：
It doesn’t matter whether he is wrong or not. (right)
Whether he is wrong or not doesn’t matter. (wrong)
(5) 含主語從句的復(fù)合句是疑問句時(shí)，主語從句不可提前。
例如：
Is it likely that it will rain in the evening? (right)
Is that will rain in the evening likely? (wrong)
4. What 與that 在引導(dǎo)主語從句時(shí)的區(qū)別。
What 引導(dǎo)主語從句時(shí)在句時(shí)在從句中充當(dāng)句子成分，如主語.賓語.表語，而that 則不然。
例如：
1) What you said yesterday is right.
2) That she is still alive is a consolation.
總結(jié)：以上就是“高中英語一輪復(fù)習(xí)知識點(diǎn)：名詞性從句”的全部內(nèi)容，請大家認(rèn)真閱讀，鞏固學(xué)過的知識，小編祝愿同學(xué)們在努力的復(fù)習(xí)后取得優(yōu)秀的成績!
相關(guān)精彩內(nèi)容推薦：
本文來自：逍遙右腦記憶 http://m.yy-art.cn/gaosan/199613.html
相關(guān)閱讀：2014高考生物一輪復(fù)習(xí)：18個(gè)高頻知識點(diǎn)