英語語法it的句型
英語最早被中世紀(jì)的英國使用，并因其廣闊的殖民地而成為世界使用面積最廣的語言。下面是小編為大家整理的關(guān)系副詞引導(dǎo)的定語從句詳解，歡迎閱讀與收藏。以下是小編整理的英語語法it的句型，希望對大家有所幫助。
It 作形式主語的常見句型：
1. 替代作主語的動詞不定式，其句型為
(1) It be adj. (for sb.) to do sth.
此處adj. 通常為描述事件的形容詞：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous…例It is illegal (for a teenager) to drive a car without a license.
(2) It be adj. of sb. to do sth.
此處adj. 通常為描述人的形容詞：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.
例It's kind of you to help me with the problem.
(3) It替代作主語的動名詞的常見句型
It's no good/use doing…It's (well)worth doing…It's (well)worth one's while doing/to do…It's (well)worth while doing/ to do例It's no use crying over spilt milk.
2. It替代作主語的從句常見句型
(1) It is + noun +從句例It is no secret that the president wants to have a second term at office.
(2) It is adj. +clauseIt's surprising that… (should)………竟然……It's a pity/shame that…(should)………竟然……例It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.)
(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze/bother/concern/frighten/please/anger sb. that…例It worried me that she drove so fast.(= It was worrying that she drove so fast.)
(4) It verb (to sb.) that…= sb/sth verb to do(verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out)例It (so) happened/chanced that they were out.(= They happened/chanced to be out.)
(5) It is v-ed that…=sb/sth is to do(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know)例It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)
(6) It is v-ed that … (should)…(verb=demand, request, require, order, suggest, advise, recommend例It is suggested that they should begin with the third question.
英語語法知識
倒裝：全部倒裝和部分倒裝
謂語部分所有單詞都放在主語前是全部倒裝。謂語的一部分放在主語的.前面是部分倒裝。
謂語中的一部分通常是指：1、系動詞;2、助動詞;3、情態(tài)動詞。
全部倒裝的五條原則：
1. There be句型;
2. 以There或now開頭的句子，且句子謂語動詞為come或go;
3. 以Here開頭的句子，且句子謂語動詞為系動詞be; Here you are. 拿去。
4. 以副詞out， in， up， down， away開頭的句子;
5. 以狀語開頭的句子。
倒裝：六條原則
1. so放在句首時表示承前肯定，這個句子用部分倒裝;
nor， neither放在句首時表示承前否定，句子也用部分倒裝;
2. 省略了引導(dǎo)詞if 的虛擬條件從句，可以把從句中的had， should， could， were中的任何一個提到從句最前面的位置，構(gòu)成部分倒裝;
3. as， though表示 盡管 時引導(dǎo)從句，從句中的表語可以置于引導(dǎo)詞之前構(gòu)成部分倒裝;
系動詞后面的部分就是表語，形容詞、名詞、名詞性短語可以置于系動詞之后。
關(guān)于英語語法
強(qiáng)調(diào)句結(jié)構(gòu)
常用的強(qiáng)調(diào)句結(jié)構(gòu)是it 引導(dǎo)的句子，結(jié)構(gòu)為It is(was)+ 被強(qiáng)調(diào)部分+ that (who) + 句子的其余部分。此結(jié)構(gòu)強(qiáng)調(diào)的成分限于主語，賓語和狀語。例如：
It is from the sun that we get light and heat. 我們是從太陽那兒獲取光和熱。
It was not until I had read your letter that I understood the true state of affairs. 知道讀了你的信，我才知道實(shí)際情形。
典型例題
1)It was last night ___ I see the comet.
A. the time B. when C. that D. which
答案C. 強(qiáng)調(diào)句的結(jié)構(gòu)是： It +be +強(qiáng)調(diào)部分 + that (who))+ 主謂句。 強(qiáng)調(diào)句的連詞只有兩個，that和who。當(dāng)強(qiáng)調(diào)的部分是人，且為句子的主語時，才用 who，其余用that。再如：原句：My father did the experiment in the lab yesterday evening.
強(qiáng)調(diào)主語： It was my father who did the experiment in the lab yesterday evening.
強(qiáng)調(diào)賓語： It was the experiment that my father did in the lab yesterday evening.
強(qiáng)調(diào)時間： It was yesterday evening that my father did the experiment in the lab. (注意不用when)
強(qiáng)調(diào)地點(diǎn)： It was in the lab that my father did the experiment yesterday evening.
2)It is ten years ___ Miss Green returned to Canada.
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