高三英語語法知識點歸納匯總
英語是我們學(xué)習(xí)的主要科目之一，英語作為國際性語言，學(xué)好英語自然有很多好處。學(xué)習(xí)英語要從最基礎(chǔ)的知識開始學(xué)，而且需要端正學(xué)習(xí)態(tài)度，因為學(xué)習(xí)外語需要堅持。下面是小編給大家整理的高三英語語法知識點，希望能幫助到大家!
高三英語語法知識點
重點句型
It was + 時間段+before…."過了多久才(怎么樣)……"
It was not long before…."不久，就……"
It will (not) be +時間段+before…."要過多久(不久)……才……"(before從句謂語動詞要用一般時態(tài))
[例句]
It was not long before he sensed the danger of the position.不久他就意識到他處境的危險。
It was five days before he came back. 五天后他才回來。
It will be half a year before you graduate from the school. 再過半年你才能畢業(yè)。
It will not be long before they understand each other. 他們大概不久就會互相了解。
in case of…(+n.) "以防;萬一";
in case that…"以防，萬一……"(謂語動詞用一般現(xiàn)在時態(tài)或should+動詞原形)
[例句]
In case of fire, what should we do?
Please remind me about it in case I forget/should forget. 萬一我忘了，請?zhí)嵝盐摇?/p>
In case (that) John comes/should come, please tell him to wait.
Please take your umbrella in case (that it rains/should rain).帶上雨傘，以防下雨。
高三英語語法知識點
一、不定式做主語：
1、不定式做主語一般表示具體的某次動作。動名詞doing表示習(xí)慣的，經(jīng)常的動作。
e.g:Tofinishthebuildinginamonthisdifficult.
Todosuchthingsisfoolish.
Toseeistobelieve.(對等)
注:1).不定式作主語時,謂語用單數(shù)
2).當(dāng)主語較長，謂語較短時，常用it做形式主語，而將不定式放到謂語的后面。
it做形式主語，不定式放在謂語動詞之后常用于下列結(jié)構(gòu)中：
(1)Itis/was+adj.+ofsb.todo…
(2)Itis+adj.+forsb.+todo…
Itiseasy/difficult/hard/foolish/unwise/right/wrong/unnecessary
(3)itis+a+名詞+todo...
Itisapity/apleasure/apleasantthing/one’sduty/anhonor/ashame/acrime/noeasyjob…todo
Ittakes(sb.)sometime/courage/patience…todo…
Itrequirescourage/patience/hardwork…todo…
注意:probable和possible均可作表語，但possible可以用不定式作真實主語，而probable不能用不定式作真實主語。
Itisprobableforhimtocometothemeeting.(錯)
Itispossibleforhimtocometothemeeting.
Itispossible/probablethathewillcometothemeeting.
高三英語語法知識點
1、所謂雙重所有格就是指將 -’s 所有格與 of 所有格結(jié)合起來一起使用：
a friend of my father’s 我父親的一位朋友
a photo of Mr Smith’s 史密斯先生的一張照片
2、雙重所有格的使用場合：
①當(dāng)被修飾名詞前有指示代詞、疑問代詞、不定代詞或數(shù)詞等限定詞時，一般要用雙重所有格：
I don’t like that big nose of David’s. 我不喜歡大衛(wèi)的那個大鼻子。
Which novel of Dickens’ are you referring to? 你談的是狄更斯的哪部小說?
Some friends of my brother’s will come. 我兄弟的一些朋友要來。
【注】被雙重所有格修飾名詞前有指示代詞時，通常帶有一定的感情色彩(如贊賞、不滿、厭惡等)：
That little daughter of your cousin’s is really a dear. 你表哥的那個小女兒真是逗人愛。(表贊賞)
That daughter of your cousin’s is constantly complaining. 你表哥的那個女兒老是在報怨。(表厭惡)
另外，被雙重所有格修飾的名詞前可以用不定冠詞，但通常不用定冠詞：
可以說：a poem of Shelly’s, a novel of Dickens’
不能說：the poem of Shelly’s, the novel of Dickens’
②有時既可用雙重所有格也可用 of 所有格，但含義稍有差別。比較：
a photo of Mary’s 瑪麗收藏的一張照片
a photo of Mary 瑪麗照的一張照片
a criticism of William’s 威廉提出的批評
a criticism of William 對威廉的批評
高三英語語法知識點
一般現(xiàn)在時：am /is /are +及物動詞的過去分詞;
例：i am asked to the party today.
(2) 一般過去時：was /were+及物動詞的過去分詞;
例：i was asked to the party last night.
(3) 現(xiàn)在進(jìn)行時：am /is /are being +及物動詞的過去分詞;
例：i am being asked to the party today.
(4) 過去進(jìn)行時：was /were being +及物動詞的過去分詞;
例：i was being asked to the party that time.
(5)一般將來時：助動詞will +be +及物動詞的過去分詞;
或：am /is /are going to +be +及物動詞的過去分詞;
例：i will be asked to the party tomorrow.
例：i am going to be asked to the party tomorrow.
(6)過去將來時：助動詞would +be +及物動詞的過去分詞;
或：was /were going to +be +及物動詞的過去分詞;
例：i would be asked to the party the next day.
例：i was going to be asked to the party the next day.
(7)現(xiàn)在完成時：助動詞has /have +been +及物動詞的過去分詞;
例：i has been asked to the party today.
(8) 過去完成時：助動詞had +been +及物動詞的過去分詞;
例：i had been asked to the party the day before.
另外,含有情態(tài)動詞的被動語態(tài)構(gòu)成為：情態(tài)動詞+助動詞be +及物動詞的過去分詞.
例：i may be asked to the party today.
高三英語語法知識點
It的用法
1、It除了代替人和物以外,還可以作形式主語.而真正的主語(不定式、動名詞或從句)則放于謂語或表語之后.
例如：It is nor easy to finish the work in two days.
然而有少數(shù)表語之后接動名詞作真正的主語.這些表語是：無助(no help)、無用(no use)、沒好處(no good);工作(hard work)、費時(a waste of time)、又危險(a danger).
例如：A、It is no use crying over spilt milk.
B、It is a waste of time waiting for him.
2、It還可以作形式賓語.通常下列動詞后面可接it作形式賓語：2f2tcjm(find,feel,think,take,consider,judge, make).
例如：A、He made it clear that he was not interested in this subject.
B、I think it no use arguing with him.
3、It用于強調(diào)句式.要強調(diào)句子的某一部分(主語、賓語、 狀語),可以把it當(dāng)作先行詞.這種句子的結(jié)構(gòu)是：It is(was)+ 被強調(diào)部分+that(who)+句子的其余部分.
例如：A、It iS Professor Lin who teaches us English—(強調(diào)主語)
B、It was in Shanghai that l saw the film.—(強調(diào)狀語)
C、It was in 1990 that I worked in the factory.(同上)
但要注意與定語從句的區(qū)別.
例如：D、It was 1990 when I worked in the factory.(定語從句)
在強調(diào)句式里,我們把強調(diào)結(jié)構(gòu)It is(was)…that除去,句子還很完整.如例句C.而例句D就不能.
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