The Third Period
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as
1用作介词
1) 作为, 当作, 担任
He worked as a teacher.
He acted as a policeman in this film.
As a work of art it is very poor.
作为艺术品这是十分拙劣的。
Treat as, regard as, consider as, think of …as
As a child, she was sent to six different schools.
2) 好象
He is dressed as a policeman.
2 副词，达到与…相同的程度，与…等同
This dress is twice as expensive as that one.
She’s as good an actor as she is a singer.
3 连词
1） 在期间，当时候
As he grew older he lost interest in everything except gardening.
I watched her as the old lady got off the bus.
2) 因为，由于
As you weren’t there I left a message.
3) 尽管，即使，虽然
Young as I am, I already know what I will be.
Much as I like you, I couldn’t share it with you.
Try as he would, he couldn’t open the door.
4) 以方式，按照
Do as I say and sit down. Leave the table as it is.
Leave the table as it is.
5) 为…之事实
As you know, the earth is round.
The Beatles, as many of you are old enough to remember, came from Liverpool.
6) 也一样（后接be或助+主语）
She’s unusually tall, as are both her parents.
They have all finished their work, as has she.
He believes, as does his family, that knowledge is power.
2 diet, food
diet 习惯上吃的食物；规定的食物。特指维持健康的定质或定量的食物(如给病人的或保健的) go/be on a diet
food 一般用语，任何能吃且有营养的东西。强调种类时，可用复数
3 keep up with, catch up with
keep up with “跟上，不落后于” ，表示并肩前进，并驾齐驱
John finds it difficult to keep up with the rest of the class in mathematics.
Can you walk a little slower? I can’t keep up with you.
Catch up with 在已经落后的情况下“追上，赶上”
He was behind in his studies because of illness, but he is catching up with the others now.
4 pace
1) c.n. 一步
The hospital is only a few paces away.
She took two paces forward.
2) c.n. 速度
She slowed down her pace so that I could keep up with her.
She moved as a good(fast, slow, walking) pace.
They walked at a pace of three miles an hour.
He left the advertising company because he couldn’t stand the pace there.
Keep pace with 与并驾齐驱，齐头并进
It’s important for a firm to keep pace with changes in the market.
Keep pace with times
5 help
1) vt help(to) do sth.
All this has helped (to) improve our service work.
Help sb. (to) do sth.
The advice helped us make progress in the study of English.
Can’t help doing sth.
2) vi 有帮助，有用
This medical handbook helps a lot.
6 function
1) n. 功能，作用 the function of the heart perform an important function
2)vi （器官）活动，（机器）运行，起作用 The machine does not function properly.
The telephone was not functioning.
7 过分做状语
因为受到老师的表扬，他学习更努力了。
如果给以更多的关心和照料，这个病人将会很快恢复健康。
那老太太回到家，后面跟着一大群孩子。
就在这时，一位白发苍苍的先生由护士搀扶着走了进来。
被读过以后，总统的报告接受大家的讨论。
8 become/be part of
I’m glad you have become part of our class, David. Welcome!
This is a dishonest plan. I don’t want to be part of it.
用part of...作主语时,谓语动词的单复数取决于of后面的名词,名词是单数,谓语动词用单数；否则用复数。
Part of the city was destroyed in the earthquake.
这座城市有一部分在地震中被毁。
Parts of the books have been given out to students.
有部分书籍已发到学生手中。
We spent (a) part of our holiday in France.
Parts of the book are interesting.
Only (a) part of his story is true.
9 amount
1)n.总数，总额Can you really afford this amount?
2)n.数量 a large amount of/large amounts of work, money, furniture
Food was provided in large/small amounts.
You will be in danger if you take the medicine in the wrong amounts.
3) vi amount to 总计，共达 The cost amounted to 250 dollars.
等于，实际上是 Your words amounts to a refusal.
10 go for 适用于，应用于
I think this report is badly written, and that goes for all the other work done in this office.(其他工作也一样)
Your brother is a clever boy. And the same goes for you.
What I have said about Smith goes for you, too.
Go back, go by, go in for, go on, go out, go over, go through, go without, on the go
11 make sure “确定，查明”或“确定，“务必...”，后跟of短语或that从句。
Go to the train station and make sure that every one of us will get a ticket.
你到火车站去一下，确保给我们每人都买到票。
11 now and then（有时，偶尔）, from time to time （不时地，经常）
12 brain
1)c.头脑a disease of the brain
The brain is the center of the nervous system.
2)u, c pl头脑，智力
He has very little brain.
She has an excellent brain.
You need brains to become a university professor.
3)c. 聪明人，知识分子
He is one of the leading brains in the country.

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