初三上册英语知识点归纳
有质量的知识才是名校的真实力，每一所这样的大学，至少都有十种左右高质知识储备在教授门手中，储备在这些学校与世界的多重联系中，正是这高质量知识的储备。接下来小编给大家分享关于初三上册英语知识点，希望对大家有所帮助！
初三上册英语知识点1
to+动词原形
（1）作主语
动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种： (1)把不定式置于句首。
如：To get there by bike will take us half an hour.
（2）用it作形式主语，把真正的主语不定式置于句后，常用于下列句式中。
如：
It+be+名词+to do It's our duty to take good care of the old.
It takes sb+some time+to do How long did it take you to finish the work?
It+be+形容词+for sb+to do It is difficult for us to finish writing the composition in a quarter of an hour.
It+be+形容词+of sb+to do It is stupid of you to write down everything (that) the teacher says.
It seems(appears)+形容词+to do It seemed impossible to save money.
在句型中，常用表示客观情况的形容词，如：difficult，easy，hard，important，impossible，necessary 等；
在句型中，常用careless，clever，good，foolish，honest，kind，lazy，nice，right，silly，stupid，wise等 表示赞扬或批评的词。
在不定式前的sb，可看作其逻辑主语。这一句式有时相当于Sb is+形容词+to do句式 ，如：It's kind of you to help me with my English.=You are kind to helpme with my English.
（3）举例
（1） It's easy (for me) to do that.我做这事太容易了
easy, difficult, hard, important, possible, impossible, comfortable, necessary, better;
the first, the next, the last, the best, too much, too little, not enough
1、It's so nice to hear your voice.
听到你的声音真高兴。
2、It's necessary for you to lock the car when you do not use it.
当你不用车的时候，锁车是有必要的。
（2） It's very kind of him to help us. 他帮助我们，他真好。
Kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考虑周到的), silly, selfish(自私的)
例句:
1、It was silly of us to believe him. 我们真愚蠢，竟然相信了他。
2、It seemed selfish of him not to give them anything. 他不给他们任何东西，这显得太自私了。
注意：
（1） 其他系动词如，look，appear等也可用于此句型
（2） 不定式作为句子成分时，动词用单数形式。
（3） 当不定式作主语的句子中又有一个不定式作表语时，不能用It is… to…的句型
(对)To see is to believe. 眼见为实。
(错)It is to believe to see.
初三上册英语知识点2
动词不定式作宾语
后面能接不定式作宾语的动词有：agree, ask, choose, decide, forget, hope, learn, want, wish, would like等。
1、We hope to get there before dark. 我们希望天黑以前到那儿。
2、The man decided to do it herself. 那个男人决定自己做那件事。
动词不定式作宾语的注意事项（2点）
1. 有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：
remember to do 记住要做某事
remember doing 记得曾经做过某事
forget to do忘记要做某事
forget doing 忘记曾经做过某事
stop to do 停下来去做某事
stop doing 停止做某事
go on to do 继续做另一件事
go on doing 继续做原来在做的事
2. 不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。
如：He found it very difficult to get to sleep.他发现很难入睡。
初三上册英语知识点3
动词不定式作宾语补足语
1. 后面能接to不定式作宾语补足语的动词有：ask, order, teach, tell, want, wish, help等。
The teacher told us to do Exercise 1. 老师要我们做练习一。
I want both of you to go. 我要你们俩去。
We helped her (to) repair her bike. 我们帮助她修理自行车。
2. 使役动词let, have, make及感官动词see, watch, notice, hear, feel等要以不带to的不定式作宾补。
Let’s have a rest. 我们休息一会吧。
I saw him come in. 我看见他进来了。
感官动词后既可跟不带to的不定式作宾补，也可跟v-ing作宾补，前者表示动作的全部过程已结束；后者表示动作正在进行。
I saw him come downstairs.我看见他下了楼。（说明他下楼了这件事）
I saw him coming downstairs.我看见他在下楼。（说明他下楼时的情景）
初三上册英语知识点4
动词不定式作定语
不定式作定语一般放在所修饰的词的后面。
I need something to eat.
Do you have something to read?
Tom was so excited that he had no word to say.
He is really a fool only to eat.
The man to stand here just now is our English teacher.
The doctor had no way to save the patient.
注意：
（1）作定语的不定式是由及物动词组成，被修饰的名词或代词与不定式之间存在方位或方式关系需要有介词。
I am looking for a room to live in. 我正在找一间住房。（方位关系）
We have many things to do experiments with.
我们有许多做实验的东西（方式关系）
（2）作定语的不定式是由“be + adj + prep”构成的动词短语。
Here there isn’t any book for me to be interested in.
We have done many things to proud of. 我们做了许多引以自豪的事。
初三上册英语知识点5
动词不定式作主语
To give is better than to receive.
To reach there on foot is impossible.
动词不定式作主语时，可以用it 代替，把实际主语不定式放在后面。
It’s better to give than to receive.
It’s impossible to reach there on foot.
It’s + adj + for sb. to do sth.
It’s not difficult for me to study English well.
It’s easy for him to work out this math problem.
在这个句型中，如果形容词与不定式的逻辑主语关系密切，并且形容词用来说明逻辑主语的性质、品质、特点等，由of引出逻辑主语。这类形容词主要有nice, kind, good, wrong, right等。
