八年級英語語法知識點
學過的英語知識點，如果不經常複習，必然會發生遺忘的現象，這是一條規律。下面是小編為大家精心整理的八年級英語語法知識點，僅供參考。
形容詞和副詞
I. 要點
A. 形容詞
1、 形容詞的用法
形容詞是用來修飾、描繪名詞的，通常在句中作定語、表語或賓補，有時還可作狀語。如：
He is honest and hardworking.
I found the book interesting.
某些形容詞與定冠詞連用表示一類人作主語時，謂語通常用複數形式。如：
The rich and the poor live in different parts of the city.
The English like to be with their families.
多個形容詞作定語修飾名詞的順序：
冠詞+序數詞+基數詞+性質狀態(描述性)+形狀大小+新舊老少+顏色+國籍+材料+名詞。如： the second five interesting big new red Chinese wall papers.
2、 形容詞比較等級的形式
(1) 規則形式
一般説來，單音節詞及少數雙音節詞在後加-er; --est 來構成比較級和最高級;其他雙音節詞及多音節詞在前加more, most.如：
great-greater-greatest
busy-busier-busiest
important-more important-(the)most important
(2) 不規則形式
good (well)-better-best
bad (ill)-worse-worst
many (much)-more-most
little-less-least
(3) 形容詞比較等級的用法
①表示兩者的比較，用形容詞的比較級+than. 如：
He is cleverer than the other boys.
This one is more beautiful than that one.
②表示兩者以上的比較，用"the +形容詞最高級(+名詞)+of(in) …"如：
He is the cleverest boy in his class.
③表示兩者是同等程度，用"as +形容詞原級+as". 如：
He is as tall as I.
I have as many books as you.
④ 越… 越…
例如：The more I learn, the happier I am.
⑤ You can never be too careful. 越小心越好
又如：You can never praise the teacher too highly.
你怎麼讚揚這個老師也不過分。
⑥ I have never spent a more worrying day.
那一天是最令我擔心的一天。
I have never had a better dinner.
這是我吃過的最好的一頓飯。
⑦ My English is no better than yours.
我的英語和你的英語都不怎麼樣。
B.副詞
1、 副詞的種類
(1) 時間副詞 如：ago, before, already, just, now, early, late, finally, tomorrow等
(2) 地點副詞 如：here, there, near, around, in, out, up, down, back, away, outside等。
(3) 方式副詞 如：carefully, angrily, badly, calmly, loudly, quickly, politely, nervously等。
(4) 程度副詞 如：almost, nearly, much, greatly, a bit, a little, hardly, so, very等。
2、 副詞比較等級的用法
其用法與形容詞相似，只是副詞最高級前可省略定冠詞。如：
Of all the boys he sings (the) most beautifully.
We must work harder.
3、 某些副詞在用法上的區別
(1) already, yet, still
already表示某事物已經發生，主要用於肯定句;yet表示期待某事發生，主要用於否定句和疑問句;still表示某事還在進行，主要用於肯定句和疑問句，有時也可用於否定句。如：
We've already watched that film.
I haven't finished my homework yet.
He still works until late every night.
(2) too, as well, also, either
too, as well和 also用於肯定句和疑問句，too和as well多用於口語，一般放在句末，而also多用於書面語，一般放在句中與動詞連用。either用於否定句和否定的疑問句，往往放在句末。如：He went there too.
He didn't go there either.
I like you as well.
I also went there.
(3) hard, hardly
hardly意為"幾乎"與hard在詞義上完全不同。如：
I work hard every day.
I can hardly remember that.
(4) late, lately
lately意為"最近、近來"，late意為"晚、遲"。如：
He never comes late.
Have you been to the museum lately?
例1 Tom's father thinks he is already ____
A high enough B tall enough
C enough high C enough tall
解析：該題正確答案是B。修飾人高用tall, 而建築物的高用high,並且enough修飾形容詞要放在形容詞後面。因此該題選B。
例2 ____ the worse I seem to be.
A When I take more medicine
B The more medicine I take
C Taking more of the medicine
D More medicine taken
解析：該題正確答案為B。"the+形容詞比較級+… , the +形容詞比較級+…"意為越…，越…。該句意為：吃的藥越多，我的病越是加重。
例3"I haven't been to London yet".
"I haven't been there ____".
A too B also C either D neither
解析：該題正確答案為C。A和B都用於肯定句中。D-neither本身意為否定"兩者都不"，而C-either則用於否定句中，意為"也"。
例4 Mr Smith was ____ moved at the news.
A deep B deeply C very deep D quite deeply
解析：該題正確答案為B。A. deep用於副詞時，修飾具體的深，如dig deep,而B-deeply則修飾表示感情色彩的詞，如該題為deeply moved.另如deeply regret等。而D-quite和deeply均為副詞，不能互相修飾。
八年級英語語法知識點(二)介詞
I. 要點
1、介詞和種類
(1) 簡單介詞，常用的有at, in, on, about, across, before, beside, for , to, without等。
(2) 複合介詞，如by means of, along with, because of, in front of, instead of等。
2、介詞和其他詞類的習慣搭配關係
(1) 和動詞的搭配，如agree with, ask for, belong to, break away from, care about等。
(2) 和形容詞的搭配，如afraid of, angry with, different from, good at
(3) 和名詞的搭配，如answer to , key to, reason for, cause of, visit to等.
3、介詞短語可以有自己的修飾語，這種修飾語通常有right, just, badly, all, well, directly, completely等少數幾個副詞。如：
He came right after dinner.
He lives directly opposite the school.
4、 某些介詞的意義與用法舉例
(1) at, on, in(表時間)
表示時間點用at,如at four o'clock, at midnight等;表示不確定的時間或短期假日也用at,如at that time, at Christmas等。
指某天用on, 如on Monday, on the end of November, 指某天的朝夕用on,如on Friday morning, on the afternoon of September lst等。
指長於或短於一天的時段用in,如in the afternoon, in February, in Summer, in 1999等。
(2) between, among(表位置)
between僅用於二者之間，但説三者或三者以上中的每兩個之間的相互關係時，也用between, 如
I'm sitting between Tom and Alice.
The village lies between three hills.
among用於三者或三者以上之間。如：
He is the best among the students.
(3) beside, besides
beside意為"在…旁邊"，而besides意為"除…之外"。如：
He sat beside me.
What do you want besides this?
(4)in the tree, on the tree
in the tree 指動物或人在樹上，而on the tree 指果實、樹葉長在樹上
(5)on the way, in the way, by the way, in this way
on the way 指在路上 in the way 指擋道
by the way 指順便問一句 in this way 用這樣的方法
(6)in the corner, at the corner
in the corner 指在拐角內 at the corner 指在拐角外
(7)in the morning, on the morning
in the morning 是一般説法 on the morning 特指某一天的早晨
(8)by bus, on the bus
by bus 是一般説法 on the bus 特指乘某一輛車
II. 例題
例1 Do you know any other foreign language____ English?
A except B but C beside D besides
解析：A、B兩項except等於but，意為"除了…"，C-beside意為"在…旁邊"，不符合題意。而D-besides, 意為"除了…之外，還有"。所以該題正確答案為D。該題意為：除了英語外，你還知道別的語言嗎?
例2 He suddenly returned ____ a rainy night.
A on B at C in D during
解析：我們均知道，at night這一短語，但如果night前有修飾詞，表具體的夜晚，則要用介詞on來修飾，故該題正確答案為A。
例3 I'm looking forward ____your letter.
A to B in C at D on
解析：該題正確答案為A。look forward to 為固定搭配，意為"期望、盼望"。
八年級英語語法知識點(三)連詞
I. 要點
1、 連詞的種類
(1) 並列連詞用來連接並列關係的詞、短語或分句，如and, for, or, both…and, either…or, neither…nor等。
(2) 從屬連詞用來引導從句，如that, if, whether, when, after, as soon as等。
除了從屬連詞(引導狀語從句)外，還有其它可以用來引導從句的詞類。它們是連接代詞和連接副詞(引導名詞性從句)，關係代詞和關係副詞(引導定語從句)。
2、 常用連詞舉例
(1)and 和，並且
They drank and sang all night.
(2) both…and 和， 既…也…
Both my parents and I went there.
(3) but 但是，而
I'm sad, but he is happy.
(4) either…or 或…或…， 要麼…要麼…
Either you're wrong, or I am.
(5) for因為
I asked him to stay, for I had something to tell him.
(6) however 然而，可是
Af first, he didn't want to go there. Later, however, he decided to go.
(7) neither…nor 既不…也不
Neither my parents nor my aunt agrees with you.
(8) not only…but(also) 不但…而且…
He not only sings well, but also dances well.
(9) or 或者，否則
Hurry up, or you'll be late.
Are you a worker or a doctor?
(10) so 因此，所以
It's getting late, so I must go.
(11) although 雖然
Although it was late, they went on working.
(12) as soon as 一 …就
I'll tell him as soon as I see him.
(13) because 因為
He didn't go to school, because he was ill.
(14)unless 除非，如果不
I won't go unless it is fine tomorrow.
(15)until 直到…
He didn't leave until eleven. (瞬間動詞用於not… until 結構)
He stayed there until eleven.
(16)while 當…時候，而 (表示對比)
While I stayed there, I met a friend of mine. (while後不可用瞬間動詞)
My pen is red while his is blue.
(17)for 因為
He was ill, for he didn't come. (結論是推斷出來的)
(18)since自從…
I have lived here since my uncle left.
(19)hardly… when 一… 就
I had hardly got to the station when the train left.
(20)as far as 就… 來説
As far as I know, that country is very small.
You may walk as far as the lake. (一直走到湖那裏)
II. 例題
例1 John plays football ____, if not better than, David.
A as well B as well as C so well D so well as
解析：該題意為：John踢足球如果不比David好的話，那也踢得和David一樣好。 和…一樣好為as well as. 故該題正確答案為B。
例2 She thought I was talking about her daughter, ____, in fact, I was talking about my daughter.
A when B where C which D while
解析：該處意為"然而"，只有while有此意思，故選D。
例3 Would you like a cup of coffee ____ shall we get down to business right away?
A. and B. then C. or D. otherwise
解析：該處意為"或者"，正確答案為C。
