英語語法大全
英語語法在英語學習中也是很重要的，它可以讓你了解英語的結構。下面是學習啦小編給大家整理的英語語法，供大家參閱!
英語語法：than用法的七個關鍵要點
than用法的七個關鍵要點
1. 在通常情況下，后接人稱代詞時可用主格也可用賓格，含義一樣。如：
He is taller than I [me]. 他比我高。
He swims faster than she [her]. 他比她游泳游得快。
若人稱代詞之后跟有動詞，則只能用主格。如：
He is taller than I am. 他比我高。
He swims faster than she does. 他比她游泳游得快。
有時用主格或賓格會導致意思的變化。比較：
I like you better than he (likes you). 我比他更喜歡你。
I like you better than (he likes) him. 我喜歡你勝過喜歡他。
2. 通常不與由 and 連接的兩個比較級連用。如：
誤：It’s colder and colder than ever
誤：Computers are cheaper and cheaper than before.
誤：She is more and more interested in English than last year.
改正的辦法：要么去掉后面的than結構，要么將and與一個比較級。如說成：It is colder than ever. 或 It is colder and colder. 等。
3. than 通常用于兩個不同的人或物在同一方面進行比較，但有時指的可能是同一個人或物在同兩個不同的方面進行比較。如：
He’s more fat than (he’s) short. 與其說他矮不如說他胖。
They are more brave than wise. 他們有勇無謀。
此類結構只能用 more 構成比較級，不能用-er 形式，即使是單音節(jié)也是如此。
4. than any other后接名詞時通常用單數形式，很少用復數。如：
He swims faster than any other student in his class. 他比班上的其他任何學生都游得快。
5. 當連接兩個非謂語動詞時，通常應保持用前后一致的形式。如：
他認為他自己開車比讓我開車要更安全些。
正：He thinks it is safer to drive himself than (to) let me drive.
正：He thinks that driving himself is safer than letting me drive.
若不是連接兩個非謂語動詞，但其后出現有動詞，則該動詞通常用動名詞(雖然也可用不定式，但不如用動名詞普通)。如：
I cleaned my shoes, which was better than doing nothing. 我把鞋子擦干凈了，這比閑著什么都不干要好。
Nothing is more unpleasant than finding [to find] insects in your bath. 最使人不快的是在浴室里發(fā)現有蟲子。
5. 類似以下這類句子，可以認為 than就是這類句子主語，也可認為than后省略了what：
He never says more than is necessary. 沒有必要的話，他從不多說。
There were more deaths than was first supposed. 死亡人數比最先預料的要多。
有時這類句子的省略可以多種形式，且有時其主語可補充完整。如：
他比預料的要來得早。
正：He came earlier than expected.
正：He came earlier than was expected.
正：He came earlier than he was expected.
6. 帶有never (a) 的比較級結構后連用了than時，是一種強調說法，通常表示最高級的含義。如：
I’ve never had a worse morning than today. 我哪一天早上也不像今天早上這樣倒霉。
若意思明確，有時可省略than結構。如：
He is fine, never better. 他很好，比以往任何時候都好。
I’ve never found a better job. 這是我找到的最好的工作。
7. 若語義需要，有時可后接when, if等引導的從句。如：
You are a little fatter than when I saw you last. 你比我上次見你時胖點了。
They work better together than if they are alone. 他們一起干比他們單干效果要好。
有時還可接沒有任何引導詞的句子。如：
The game was closer than the score suggests. 實際的比賽與所得的分數相比更難分高下。
英語語法：as的用法詳解
A. adv. to the same degree or amount; equally 同樣地，一樣地
He was angry, but she was just as angry.
=She was as angry as he was.
他生氣了，但她同樣生氣。
He has a lot of time but I don’t have as much (as he does).
=I have less time than he has.
他有很多時間，但我沒有那么多。
B. prep.
(1) in the same way as; like像，如同
Everyone rose as one.
=everyone rose together.
大家一起同時起立。
I only like such small animals as cats and dogs. 我只喜歡像貓和狗一類的小動物。
as和like在漢語中都譯做“像”，但字面下的隱含意思是不同的。
like側重A與B兩者間的比較，并不意味著A和B屬于一類或完全相似。
He speaks English like an Englishman.
=He speaks English in a way an Englishman speaks English.
他說起英語來有些像英國人。
as則側重于同一性，意味著A與B兩者屬于同一類或完全相似。
He speaks English as an Englishman.
=He speaks English as well as an English.
他說起英語來和英國人一樣好。
She was dressed as a man. 她打扮成了男人。(儼然她就是個男人了)。(相同事物)
She was dressed like a man. 她像男人那樣穿衣服(依然可見她是個女人)。(不同事物)
(2) in the capacity/job/role/character/condition/function of以...身份，以...為職業(yè)，扮演...角色，具有...特性，在...狀態(tài)下，起...功能/作用
As a schoolboy, he showed every sign of genius. 當他還是個小學生的時候，就顯示出了天資聰慧。
The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
The news came as no surprise. 這消息來得并不突然。
The man was described as tall and dark, and aged about 20. 據描述這男人高個子，深色皮膚，年齡在20歲左右。
They regarded the lecture as boring. 他們認為講座很乏味。
Many people use education as a steppingstone to a better life.許多人將教育作為贏得更好的生活的手段。
Marion works as a journalist. 馬里恩的職業(yè)是新聞工作者。
I used to look on him as a friend. 我以前把他看作是一位朋友。
C. conj.
(1) to the amount or degree that 像...一樣(引導比較狀語從句)
The fabric was as soft as silk. 那件織品軟得像絲綢。
(2) in the way in which 以...方式，如同...那樣(引導表語從句和方式狀語從句)
It is as you told me. 事情正如你告訴我的那樣。
Do in Rome as the Romans do. 入鄉(xiāng)隨俗。
(3) in spite of the fact that, though雖然，盡管(引導讓步狀語從句)
(a) adj./v-ed2/v-ing+as+主語+系動詞。如：
Oldest as he is in the office, he works hardest.盡管他是辦公室里年齡最大的，他工作最努力。
注意：adj./adv.最高級前應省去定冠詞the。
Well-written as the book is, the author is not satisfied and prepared to revise it.盡管這本書寫得很好，作者還是不滿意并打算修改它。
(b) adv.+as+主語+謂語部分。如：
Much as I admire his courage, I don’t think he acted wisely.我雖然崇拜他的勇氣，但我認為他這樣做是不明智的。
(c) n./pron.+as+主語+系動詞。如：
Student as he is, he does not study hard.他雖然是個學生，卻不努力學習。
You can use my bike, such as it is. 盡管我的自行車不好，請將就用吧。
注意：單形可數n.[c, s]前應省去冠詞a(n)。
(d) 動詞原形+as+主語+謂語的其它部分(時態(tài)助動詞/情態(tài)動詞)。如：
Try as you will, you won’t be able to persuade him.不管你怎么努力，你都說服不了他。
(4) at or during the time that; when; while當...的時候;隨著...(引導時間狀語從句)
He slipped as he was walking to his car. 當他走向車子時，他摔倒了。
He became stout as he grew older. 隨著年齡的增長，他發(fā)胖了。
(5) for the reason that; because, since因為(引導原因狀語從句)
She may need some help as she's new. 他可能需要幫助，因為他是新手。
英語語法：opposite用法分述
該詞有多種詞性，使用時需注意。
1. 用作介詞，表示“在……對面”：如：
The hotel is opposite the church. 旅館在教堂對面。
Hang the picture on the wall opposite the window. 把畫掛在窗戶對面的墻上。
I sat opposite him during the meal. 席間我坐在他的對面。
有時其后還可連用介詞to構成復合介詞。如：
He sat opposite (to) her during the meal. 吃飯的時候他坐在她的對面。
注意，住在街道一邊的人在談到街道另一邊的房子時應該說the houses opposite us(我們對面的房子)，而不說the houses in front of us，后者的意思是“在我們前面的房子”。
2. 用作形容詞，注意以下用法：
(1) 表示“對面的”，若指的是某事物的另一邊(on the other side of)，則通常用于名詞前作定語。如：
He struck out for the opposite bank. 他奮力向對岸游去。
Answers are given on the opposite page. 答案在對面一頁上。
但是，若指的是面對說話人、聽話人或某個特定的人或物，則習慣上要用于名詞后作定語。如：
The man you are looking for is in the shop directly opposite. 你找的那個人就在對面的商店里。
Can you see where the grammar books are? The dictionaries are on the shelf directly opposite. 你看見語法書在哪兒呢嗎? 詞典都在正對著的書架上。
比較下面兩個句子：
He lives in the opposite house. 他住在街對面的房子里。
He lives in the house opposite. 他住在對面的那座房子里。
(2) 表示“完全不同的”“相反的”，若指“與……相反”，通常與介詞to搭配。如：
She went off in the opposite direction. 她往相反的方向走了。
I’ve got exactly the opposite opinion to yours. 我的意見和你的正相反。
注意習語the opposite sex(異性)。如：
He found it difficult to talk to members of the opposite sex. 他覺得很難與異性交談。
3. 用作副詞，表示“在對面”。如：
He was fascinated by the woman sitting opposite. 他被坐在對面的女士迷住了。
The window was broken by the boy who lives opposite. 窗戶被住在對面的那個男孩打破了。
4. 用作名詞，有兩個意思是一是表示“反義詞”，二是表示“對立的事物”“相反的事物”，為可數名詞。如：
Black and white are opposites. 黑白是對立物。
But everything has an opposite. 但一切都有相反的一面。
You are nice; he is just the opposite. 你為人很好，他卻恰恰相反。
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