连词since的用法

morning

考考你
（ ）1 _______ the students came from different countries, they got along（相处）quite well in the summer camp.
A.While B.Unless C.Since D.Until 知识点解析
首先我们来看看你学会识别连词了吗？
1 We have been friends since childhood.
2 We have been friends since we were five.
这两个句子中的since是什么词呢？
马上给你揭晓答案哦。

Since做连词是，有两个意思需要记忆，来看例句吧。
1 Since we were five, we have been friends.
2 Since they’re quite hard to find, these stones are rather expensive.
（主从句的位置是可以互换的）
以上两句话中，since表到了两层含义：
1 【表时间】自从（某时起，就一直怎样）
注意：从句用一般过去时态（did ），主句用完成时态（has/have done,had been doing等 ）
She had been talking to her mother about the lives of homeless people since they first saw the homeless man.
自从他们第一次看到那个流浪汉，她就一直跟她妈妈聊流浪人群的生活现状。
2 【表原因】由于，既然（同as）
那么之前的两个例句，意思就很清楚了：
1 Since we were five, we have been friends.
从五岁开始，我们就一直是朋友。
2 Since they’re quite hard to find, these stones are rather expensive.
由于这些石头非常稀有，所以它们的售价较为昂贵。
阅读中，一旦确认since作连词，1 首先想“由于、既然”和“自从”这两个意思；2 表示“自从”时，观察主句时态→完成时态 测一测
（ ）2 Since everything can be done from home with computers, there’s no need to dress up for work anymore.
since在这句话中的意思是________
A 由于， 既然 B 自从
（ ）3 He has been back to the office a few times ______ he retired.
A. if B. since C.as D.because
（ ）4 _______ scientists have learned a lot about the universe, there is much we still don’t know.
A.Once B.Since C.Though D.If 真题再现
These effects of the Internet have become even more striking since I’ve begun using smartphone.
You have been very kind and helpful since we knew each other.
It’s been a month since I came to this new school.  坚持每天记10个短语哦！
61．as 1ong as 如果，只要，既然
As long as it doesn’t rain，we can go．
只要不下雨，我们就可以去。

62．apply for 申请，请求
He applied for a job in the supermarket．
他申请超市的一份工作。

63．get upset 难过
Don’t get upset．It’s not your fault．
别难过，不是你的错。

64．be prepared to do 准备……
You must be prepared lo workhard!
你必须认真准备工作。

65．keep…from 阻止
The heavy rain kept us from coming on time．
大雨使我们没有及时到来。

66．give up 放弃
We should give up smoking in order to keep healthy．
为了健康我们必须戒烟。

67．know of 熟悉，了解
I don’t know the writer，hut I know of him．
我不认识这个作家，但我了解他。

68．put out 扑灭
At last firemen have put out a big forest fire in California．
消防队员终于扑灭了加利福尼亚洲的一场森林大火。

69．from then on 从那时起
From then on she knew she wouldwin．
她从那时起就知道自己会得胜。

70．be strict with 严格要求
You should be strict with yourselves and spend 1ess time on playinggames and more on study．
你应该严格要求自己，少玩游戏多学习。

上期答案
考考你
（A）1.If you don’t understand something, you ma research, study, and talk to other people ______ you figure it out.
A.because B.until C.as D.though

测一测
（B ）2.As the average age of the population increases, there are more and more old people to care for.
as在这句话中的意思是_______
A.按照 B.由于，既然 C.当
（C ）3.We were lying on the beach sunbathing（阳光浴）as they were playing volleyball.
as在这句话中的意思是_______
A.按照 B.由于，既然 C.当
（A ）4.Leave the papers（文件）as they are.
as在这句话中的意思是_______
A.按照 B.由于，既然 C.当