1.高二英语必修四下册知识点
1.一般现在时:
一般现在时大多用动词原形来表示。Be\have在人称和数上应按自己的变化规则与主语保持一致。其他动词若其主语是第三人称单数,则应按动词第三人称单数的变化规律变化。
(1)表示主语现在所处的状态及所具备的特征、性格、能力等。 Eg:They are both tired and hungry.
(2)表示习惯性的,反复出现的动作与状态。
常用时间状语:always often sometimes now and then every day
(3)表示客观事实或普遍真理。
Eg:The earth moves around the sun.
(4)在时间状语从句和条件状语从句表示将来的动作。
Eg:If it doesn’t rain tomorrow,we will go climbing.
(5)表示按规定预计要发生的动作,只限于go,come,leave,start,stay,return,begin等。
(6)在某些以have,there开头的句子中,用动词go,come的一般现在时表示正在发生的动作。
Eg:Here comes the bus!
2.现在进行时:
(1)表示说话时正在进行的动作;
(2)表示即将发生的或按计划安排好的动作,多限于go,come,start,leave,return,arrive,stay,fly等表示运动方向的动词,句中往往有表示将来的时间状语。
(3)少数动词如go,come,leave,arrive,return,begin,do,die,lose等现在进行时可以表示预计即将发生的动作;
(4)表示反复发生的动作。
3.以-ing和-ed结尾的形容词:
以-ed结尾的形容词用来描述人的精神状态或人对事物的态度或感受;以-ing结尾的形容词有“令人......的”意思,常用来指物。
2.高二英语必修四下册知识点
1、place orders for sth. 订购 in order of age 按照年龄的顺序 in disorder = out of order 混乱
2、arrest sb. for sth. 因某事而逮捕某人 be under arrest 在逮捕中
3、free o
fcharge 免费 charge sb. for sth. 向某人索要某物 get sth. charged 给某物充电 take charge of = be in charge of 负责 take the charge of = be in the charge of 被负责
4、at a flick of a switch 轻按开关 switch on/off 打开/关闭 switch to 调到
5、not all most 几乎不 not nearly 远非
6、be busy doing = be occupied with sth./in doing sth. 忙于 on business 出差
7、throw/cast/shad light on 阐明观点
8、be/get stuck in = be trapped in 被困于,陷在 be stuck with 被……纠缠不清
stick to the plan 坚持计划 stick to doing = insist on doing = persist in doing
9、be marked with 标记 be caved with 雕刻
10、It’s worthwhile to do/of doing = be worth doing = be worthy of being done/of to be done 值得
11、limit to = restrict to 局限于
12、get around/round/about 到处走动;传播
13、at no time 决不 in no time 立刻
14、be on show/exhibition/display 在展览上
15、be crowded with 拥挤 the crowd 人群
16、the solution to ……的解决 the key to ……的关键 the answer to ……的答案 (to为介词)
17、stand in line = stand in a queue 站成一列
18、carry out 执行
19、keep cool = keep calm = calm down 镇定下来
20、greet sb. with sth. 用某物来问候某人
3.高二英语必修四下册知识点
不定代词的用法
不是指明代替任何特定名词的代词叫不定代词。
常见的不定代词有 all, both, each, every, some, any, many, much, (a)few, (a)little, one, ones, either, neither, other, another, no, none 以 及含有 some-, any-, no-等的合成代词(如:anybody, something, no one) 。
这些不定代词大多 可以代替名词,在句子中作主语、宾语、表语或定语。但 none 和由 some, any, no, every 构 成的复合不定代词(如 somebody 等)只能作主语、 宾语和表语。 every 和 no 只能作定语。
不定代词可作主语。当作主语时,要明确这一不定代词究竟是单数还是复数,以确定它和 谓语动词在人和数的一致。
不定代词还可作定语。当作定语时,应该注意其所修饰的名词是可数还是不可数,以确定 这个名词用单数还是复数。
例: Much has been done to fight pollution;each of them has got a present.
many, few 和 both 用于可数名词,表示复数概念。
All, both 和 each 和含有 every 的复合代词用在否定句中只表示部分否定。
例:Not all the students have been to the Austrlia. She can’t work out both of the difficult problems. Everybody cannot work out the problem.
Neither,none 和含有 no 的复合代词表示全部否定。
例: None of us can answer the question. Neither of the questions is right.
4.高二英语必修四下册知识点
句子成分的省略
为了避免重复,或者为了使某一内容引人注目,可以省略某些句子成分而保持句子原意不变。
1、省略主语
Beg your pardon.请你原谅。(= I beg your pardon.))
Serves you right.你活该(= It serves you right.)
2、省略谓语
Anything the matter?要紧吗?(= Is anything the matter?)
The river was deep and the ice thin.河很深,冰很薄。
(= The river was deep and the ice was thin.)
3、省略表语
Are you ready? Yes,I am.(am后面省略了表语ready)
4、省略宾语
We have to analyze and solve problems. (analyze后省略了宾语problems)
Let's do the dishes. I'll wash and you'll dry.(wash和dry后面省略了宾语dishes)
5、省略定语
He spent part of the money, and the rest he saved.(the rest后面省略了定语of the money)
5.高二英语必修四下册知识点
assist
vt.&vi.帮助;援助;参与;出席
常用结构:
assist sb. in/with sth.帮助(某人)某事
assist sb. in doing sth.帮助(某人)做某事
assist sb. to do sth.帮助(某人)做某事
assist with帮助(照料,做);在……上给予帮助
I am willing to assist you whenever there is an opportunity.
有机会我愿随时帮你。
I’m afraid I can’t assist you, you have to go and see the manager.我恐怕帮不上忙,你得去找经理。
The headmaster assists with a lot of things when free.
有空时校长会帮忙做很多事。