初中英语 仁爱版九年级上册Unit2 Topic 2知识点

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Unit2 Topic 2
Section A
1.strongly用于形容风刮得很猛,heavily用于形容雨下得很大。

2.People have cut down too many trees.人们砍伐了太多的树。

cut down砍掉,砍倒Trees are very useful to us.We shouldn’t cut them down.树对我们非常有用。

我们不应该砍掉它们。

cut down接代词放在中间,接名词放在中间或末尾均可。

cut down还可意为“减少,缩短”。

You smoke too much.You should try to cut down.你抽烟太凶了。

应该少抽点。

与cut相关的短语:cut in插嘴,打断(谈话)cut off切断(电源,水),中断cut out(用剪刀)剪下cut up切碎,剁碎
3.as a result结果as a result of+宾语
4.change...into...=turn...into...转换成,把...变成...
Eg:I have to wait for the traffic lights to change/turn into green.我不得不等交通灯变成绿色。

5.desert(名词)沙漠(动词)舍弃,遗弃
6.stop...from=prevent...from=keep...from妨碍,防止,预防。

from后都加doing sth. stop/keep/prevent...from doing sth.阻止(避免)...做某事
stop from 与prevent from里的from可以省略,而keep...from的from不可以省略。

protect...from...:保护...不受...的侵害
7. A lot of water can be saved by forests.森林可以贮存大量的水分。

save贮存,保留,保存。

We’ll eat some now and save some for tomorrow.
(1)save sb. sth.=save sth. for sb.为某人保留
Will you save me a seat on the bus?请在公交车上给我留个座位好吗?
(2)save还可意为“节省,节约,避免(金钱,时间,精力等的)浪费”。

We’ll save much time if we go by bus.如果我们搭公交车去可以节省很多时间。

(3)save还可意为“救,拯救,挽救”。

save one’s life挽救某人的生命。

He saved his friend’s life in the accident.在这次事故中,他挽救了他朋友的生命。

8.human being人human人类
9.although是连词,意为“虽然,尽管”,引导的从句不可与but,however连用,但可与yet,still连用。

Eg:Although he was old,he still worked hard.
He was old,but he still worked hard.
e into being形成
11.in danger处于危险的状况12.die out灭绝
13.Humans have come to realize the importance of protecting animals.人类已经开始意识到保护动物的重要性。

come to 想到,意识到;(数量)总计,总共That comes to 23yuan.总共23元。

the importance of :...的重要性Many people have realized the importance of trees. Section B
1.It says that...:在此句型中主语是事或物,用文字、数字等传达或表明信息。

It says in the newspaper that pollution is still a serious problem.报纸上说污染仍是个严重的问题。

2.形容词修饰复合不定代词时,要放在所修饰词的后面something useful,nothing important;动词不定式修饰不定代词时,也要放在所修饰词后something to do。

useful是由名词use+形容词后缀-ful构成的。

名词+形容词后缀-ful=形容词。

Eg:painful疼痛的hopeful有希望的careful小心的,仔细的helpful有帮助的
3.None of us like pollution.没有人喜欢污染。

none(代词)没有一个,没有一点儿,全无
(1)none作主语时,谓语动词用单数。

None of the work was done.这个工作都没有被做。

(2)none作为代词时,常可与of连用。

none of +不可数名词,谓语动词用单数;none of +可数名词复数,谓语动词根据实际意义选用单数或复数。

None of my friends has/have been there.我的朋友没有一个去过那儿。

(3)none在使用时不仅指人,还可指物。

而no one/nobody(没有人)只能指人,不能指物。

no one/nobody后面不能接of;no one/nobody作主语时,谓语动词用单数。

No one/Nobody has been there.没有人去过那儿。

(4)当回答who所引起的特殊疑问句时,要表示没有人,用no one,而nobody 通常不用在答语。

—Who are you speaking to? —No one.
当回答how many/how much所引起的特殊疑问句时,要表示没有人,用none。

—How many students have been there? —None.
—How much milk is there in the bottle? —None.
(5)nobody相当于no one,两者可与else连用,而none则不可以。

No one/Nobody else knows about that.没有其他的人知道这件事。

4.here and there=everywhere到处
5.比较everyone与every one
(1)everyone为不定代词,意为“大家,人人,每人”,它等于everybody。

作主语时,谓语动词用单数。

Everyone/Everybody is here.每个人都到齐了。

(2)every one表示“人人,每个人”时,等于everyone。

Every one has known this.=Everyone has known this.每个人都知道这件事。

(3)every one还可指物,everyone则不可以。

(4)every one中的every是形容词,修饰one,意为“每个”,后可跟of,表示范围,意为“...中的每一个”,而everyone则不可以。

He ate every one of the apples.他把每个苹果都吃了。

6.everything是不定代词,意为“每件事物,一切”,不特指哪一个事物。

everything 作主语时,谓语动词用单数。

Everything goes well.一切安好。

/一切顺利。

7.in the beginning在开始
Section C
1.on the earth在地球上;on earth在地球上;究竟,到底(位于疑问词后)
What on earth did you want to say?你刚才究竟想说什么?
2.while表示对比,意思是“然而”
He likes sports while I like collecting stamps.他喜欢运动而我则爱好集邮。

lions of无数的,大量的,数以百万计的
4.take away拿走,带走
5.rise(不及物动词)升起,上升,用来说明主语自身移向较高的位置。

Eg:The temperature is rising.温度正在不断上升。

The sun rises in the east.太阳从东方升起。

The water in the river is rising slowly.河水在慢慢上涨。

raise(及物动词)举起,提起,抬高,说明主语发生的动作要作用于其他事物。

Eg:He raised his voice.他提高了嗓音。

lift(及物动词)举起,提起,向上升
Eg:He lifted the heavy box.他举起了这个重箱子。

6.refer to提到,涉及,有关。