2019中考知识点补充
1.比较级常用
1.the+比较级, the+比较级意为“越……就越……”
The better I knew him, the more I liked him. 我越了解他就越喜欢他。
2. the+比较级+of the two 表示“两者中较…的那个人或物”时,比较级前加the。
He is the taller of the two. 他是两人中较高的那个。
3.比较级+and+比较级越来越…”,单音节形容词或副词用“-er+and +-er”
Things are getting better and better every day. 情况一天天好起来。
4.not +比较级+ than / no +比较级+ than比较级前加not,表示前者不如后者,
与not as…as相当;比较级前加no是对两者的否定,意为“和……一样不……”,
与neither…nor…或“as+相反意义的形容词或副词+as”相当。
He is not taller than me. 他不如我高。
He is no taller than me. 他同我一样不高。(即一样矮)
5.no more than与not more than两者均可表示数量,前者表示“仅仅”、“只不过”,
强调少;而后者表示“不多于”、“至多”。
This test takes no more than thirty minutes. 这个测验只需30分钟。
He has not more than three children. 他最多 3 个孩子(有或许还不到 3 个之
意)。
6.no more…than与not more…than两者均可用于比较,前者表示对两者都否定,
意为“同……一样不”(=neither ... nor);而后者意为“不如”、“不及”(= not
so ... as)。如:
He is no more a writer than a painter. 他不是画家,也不是作家。(= He is
neither a painter nor a writer.)
She is not more clever than he is. 她不如他聪明。(= She is not so clever
as he is.)
2.but, except, besides 之间的区别
1. 三者都可表示“除外”,但 besides 表示一种累加关系,意指“除了什么之外,还有……”;而 except 或 but 则表示一种排除关系,意指“除了什么之外,不再有……”。如:Besides his wife,his daughter also went to see him. 除他妻子外,他女儿也去看过他(即妻子女儿都去看过他)。
Nobody went to see him except [but] his wife. 除他妻子外,没有一个人看过他(即只有他妻子去看过他)。
注:在否定句中,besides 也表示“除……之外不再有……”,与but, except 同义。如:No one passed the exam besides [except] Jim. 除吉姆外,没一个人通过考试。
2. 关于 but 与 except:
(1) 两者都可表示“除……外不再有……”,但含义上略有差别:but侧重指意义的几乎完整性,而 except 则侧重指后面除去的部分。比较:
All are here but one. 除一个人都到了。
All are here except one. 还有一个人没到。
3. but 一定不能用于句首,except 通常不用于句首:
除我之外每个人都累了。
正:Everyone is tired but (except) me.正:Everyone but (except) me is tired.
误:But (Except) me, everyone is tired.
注:except for 可用于句首,表示 except 的意思:
正:Except for me, everyone is tired.
4. 关于 except 与 except for:
except 主要用来谈论同类的东西,而 except for 则主要用来谈论不同类的东西,有时含有惋惜之意。如:
All compositions are well written except yours. 除了你的作文外,其他的作文都写得很好。
His composition is good except for a few spelling mistakes. 他的作文写得不错,只是有几处拼写错误。
5. 关于 except for 与 but for:
except for 主要表示排除,but for 主要表示一种虚拟条件(与虚拟语气连用)。如:Except for me, everyone passed the exam. 除了我之外,大家都通过了考试。
But for my help, she would not have passed the exam. 若不是我的帮助,她就不会通过考试。
6. besides 除用作介词外,还用作副词,其意为“此外”、“而且”,可用于分句句首(通常用逗号隔开)或句尾。如:
I don’t want to go; besides, I’m too tired. 我不想去,而且我也太累了。
3.forget的用法与常见搭配
1.forget to do something表示“忘记了做某事”,事情还没有做。如:I’m sorry I forgot
to return the library book.对不起,我忘记归还图书馆的书了。(书没有还)
2.forget doing something表示“忘记曾经做过某事”,事情已经做过了。如:He forgot
going to Shanghai with his parents when he was five years old. 他忘记了五岁时曾跟父母去过上海。(五岁时去过上海)
3.forget还有以下几种常用词组:forget oneself (忘我;奋不顾身)
4.forget one’s name(忘了某人的名字)forget it (别提它了;别在意)
4.whether和if
1.都可以引导宾语从句,表示“是否”,在口语或间接引语中两者可以互换使用。如:
2.I wonder if / whether I can get some advice from you.
3.Ask him whether / if he can come.
4.但在有些情况下,whether和if的用法有一定区别。
5.whether引导的从句常可以与连词or或or not直接连用,而if一般不能。如:
6.正: Let me know whether you can come or not.
7.误: Let me know if you can come or not.
8.当宾语从句提到句首时,只能用whether引导,而不能用if。如:
9.正:Whether it is true or not, I can’t tell.
10.误:If it is true or not, I can’t tell.
11.whether可以引导带to的不定式,if则不能。如:
12.正:I don’t know whether to accept or refuse.
13.误:I don’t know if to accept or refuse.
14.whether及其引导的成分可放于介词之后,作介词的宾语,但if不能。如:
15.正: I worry about whether I hurt her feelings.
16.误: I worry about if I hurt her feelings.
17. whether可以引导从句,作主语、表语或同位语,而if不能。如:
18.正: It was uncertain whether he would come.
19.误: It was uncertain if he would come.
20.正: His first question was whether Tom had arrived yet.
21.误: His first question was if Tom had arrived yet.
22.正: We must consider the question whether we will take these measures.
23.误: We must consider the question if we will take these measures.
5.Worth worthy worthwhile的用法区别
1.固定搭配
【be worth +动名词】某事值得被做
【be worth +n/代】<多指时间,金钱或精力等>
【sth. be worthy to be done】某事值得做……
【sth. be worthy of being done】= sth. be worth doing某事值得做……
【sth. be worthy of +n】〈除金钱,时间,精力以外的其它名词〉
【sth. be worth while】某事值得花时间〈去做〉。
【It is worthwhile to do sth.】花时间去某事是值得的。
【It is worthwhile doing sth.】花时间去某事是值得的。
【sth. be worth one’s/the while】某事值得花时间〈去做〉
【It is worth one’s/the while to do sth.】花时间去某事是值得的。
2.在很多情况下,同一个意思可用几种不同的形式表达。如:
那个地方值得一去。
正:The place is worth a visit.
正:The place is worthy of a visit.
正:The place is worth visiting.
正:It is worth visiting the place.
正:The place is worthy of being visited.
正:The place is worthy to be visited.
正:It is worthwhile visiting the place.
正:It is worthwhile to visit the place.
6.被动语态的基本结构:
7. 1.一般现在时:主语+助动词Be+及物动词的过去分词
一般过去时: 主语+助动词Be的过去式was/were+及物动词的过去分词
Eg:(1) This kind of computer is made in that company .
(2 ) Flowers were watered yesterday .
8. 2. 以下几种情况用被动语态:
( 1)不清楚谁是动作执行者时.eg:My book has been stolen.
(2 )没有必要或不想说出动作执行者时.eg:Flowers are grown well there.
(3 )强调动作的承受者时; eg: The CD-ROM has been sold out.
3.及物动词能够成被动语态,不及物动词不能够成被动语态.只有这些,不及物动词与
介词或副词构成不可分割的短语,并且带有宾语时,才能用被动语态.
Eg: The children are looked after very well in the school .
4.有些动词带有双宾语,变成被动语态时,两个宾语都可以作被动语态中的主语,但间
接宾语作主语的较多.
Eg; Kitty gives me an apple. (改成被动式)
An apple is given to me
5.有些动词后接不定式作宾语原可省“to”的,变被动语态时要加上“to”。
Eg ;Her mother makes her read English once a day 。(变被动式)
She is made to read English once a day 。
(例如感官动词和使役动词:hear ,watch ,make ,help ,let ,see ,have ……)
6.一些有关被动语态的知识点;
一般将来时:will / shall be + 及物动词的过去分词
现在进行时:am / is / are being + 及物动词的过去分词
过去进行时:were / was being + 及物动词的过去分词
现在完成时:have / has been + 及物动词的过去分词
过去完成时:had / been + 及物动词的过去分词
现在完成时
1.现在完成时的关键词归纳
关键词释
义
用于……位置例句
already 已经肯定句(否定、疑
问句换成yet)句中(has/have和过
去分词之间)
句末
I have already done my homework.
yet已经否定句
疑问句句末Mr and Mrs Li haven’t come ba ck
yet.
Have you finished your homework
yet
for/肯定句否定句疑
问句句中(一段时间前)Eddie has lived with Millie for
four years.
since自从肯定句否定句疑
问句句中(一点时间前)Eddie has lived with Millie since
he was born.
ever曾经疑问句肯定句
(跟最高级连用)句中(has/have和过
去分词之间)
Have you ever been to France
This is the best novel that he has
ever written.
英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和非延续性动词。
延续性动词表示能够延续的动作,这种动作可以延续下去或产生持久影响。此类动词常见的如:learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。
非延续性动词也称终止性动词、瞬间动词或短暂性动词,表示不能延续的动作,这种动作发生后立即结束。
注:1. 非延续动词可以有现在完成时态,但不可以接一段时间,若要接一段时间,须要做一些相应的变换。