1.高二年级必修五英语知识点总结
1. 作原因状语，等于as / since / because 引导从句
Moved by what she said ,we couldn’t help crying . = ( As we are moved by what she said
2. 作时间状语，等于when 引导时间从句，如果分词表示的动作与谓语的动作同时发生，可在分词前加when/ while / until 等使时间意义更明确。 When heated , water can be changed into steam .
Seen from the hill ,the park looks very beautiful .= ( When the park is seen from the hill
3. 作条件状语等于 if / whether 引导从句
Given more attention , the cabbages could have grown better .= ( If they have been given more attention
Compared with you , we still have a long way to go = ( If we are compared with you
4. 作方式或伴随状语
The actress came in , followed by her fans . She sat by the window , lost in thought .
5. 作让步状语
Much tired ,he still kept on working .=(Although he was tired ,) he ….
6. 独立主格结构： 当分词的逻辑主语不是主句主语时，分词可以有自己独立的逻辑主语，这种结构称为独立主格结构。常用来表示伴随情况。 The boy rushed into the classroom , his face covered with sweat . All things considered ,your article is of great value than hers .
2.高二年级必修五英语知识点总结
主语从句不可位于句首的五种情况
(1) if引导的主语从句不可居于复合句句首。
(2) It is said , (reported) …结构中的主语从句不可提前。例如：
It is said that President Jingo will visit our school next week.
(3) It happens…, It occurs… 结构中的主语从句不可提前。例如：
It occurred to him that he failed in the examination.
(4) It doesn’t matter how/whether …结构中的主语从句不可提前。例如：
It doesn’t matter whether he is wrong or not..
(5) 含主语从句的复合句是疑问句时，主语从句不可提前。例如：
Is it likely that it will rain in the evening?
3.高二年级必修五英语知识点总结
倒装句：
一、here, there, now, then, thus 等副词置于句首, 谓语动词常用 be, come, go, lie, run。
There goes the bell. 铃声响了。
Then came the chairman.主席来了。
Here is your letter. 你的信。
二、否定词置于句首，句子应进行倒装。 neither 放句首
Tod can't swim, neither can I. 托德不会游泳，我也不会。
用于 never, hardly, seldom, scarcely, barely, little, often, at no time, not only, not once, many a time 等词开头的句子。
Never shall I go there again. 我再也不去那了。
Little did he know who the woman was.他基本上不知道那女人是谁。
Seldom was he late for class.他很少上学迟到。
用于 no sooner ... than ..., hardly... when... 和 not until... 的句型中
Hardly had I reached the station when the train left. 我刚到车站,火车就离开了。
No sooner had she gone out than the phone rang. 她刚离开,电话就响了。
Not until the teacher came did he finish his homework. 直到老师来，他才完成作业。
4.高二年级必修五英语知识点总结
【现在完成进行时】
1. 现在完成进行时的定义
现在完成进行时表示某动作从过去某个时间开始，一直延续到现在，并且还有可能持续下去。如：
We have been waiting for him for two hours. 我们等他等了两个小时。
2. 现在完成进行时的结构
现在完成进行时由“have /has been + 现在分词”构成。
3. 现在完成进行时的应用
现在完成进行时所用的时间状语：this month / week / year, these days, recently / lately, in the past few + 时间段, since +时间点, for + 时间段。如：
They have been building the bridge for two month. 两个月来他们一直在修桥。
They have been planting trees this month. 这个月来他们一直在植树。
4. 现在完成进行时与现在完成时的区别
(1) 现在完成时强调动作的完成，而现在完成进行时强调动作的延续，因此，表示动作的完成，只能用现在完成时，而不能用现在完成进行时。如：
He has changed his idea. 他改变了想法。
(2) 在表示动作的延续时，虽然既可用现在完成时，也可用现在完成进行时，但现在完成进行时强调动作的进行。因此在需要明确表示动作还要持续下去时，应用现在完成进行时。如：
We have been studying here for two years. 我们在这儿已经学习了两年了。
(3) 有些延续性动词(如 keep, learn, live, stay, study, work等)，用于现在完成时或现在完成进行时的区别不大。如：
I have lived here for many years.=I have been living here for many years. 我在这儿住了多年了。
5.高二年级必修五英语知识点总结
表示时间的介词
(1) in表示“在某一时间段”或“在某一时候”，如用在月、季、年份、时代、世纪等时间名词的前面，或用来泛指一天的某一段时间。in也可以指“在……之后”，表示从说话起的若干时间内。
如： in July/summer/20xx/ancient times
The bus will be here in ten minutes.
(2) on表示“在特定的某一天”，也可用于带有修饰语的.一天的某个时间段之前。如：on Saturday, on Saturday morning, on the morning of August 1st
(3) at表示“在某一时间点”，或用来表示不确定的时间和短期的假日、时节等。
如：at six o'clock, at Easter
(4) over, through (out)两者均指“经过的全部时间”。
如：Stay over the Christmas.
(5) for与since：for表示动作或状态延续的全部时间长度，为“长达……”之意;since用于指从过去特定的某个时刻到说话时为止的一段时间;含有since时间短语的句子要用完成时，但含有for时间短语的句子不一定要用完成时。
6.高二年级必修五英语知识点总结
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。
标签： 高二 高二年级必修五英语知识点总结
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