since的用法

since的用法：译作“自从…以来”
(1)接时间点：如 I have stayed in that country since 1995. 要求：谓v.用现在完成时，而且须
是延续性动词。
接一段时间 + ago：如 They have lived in that house since two years ago. 要求：谓v.用现在完
成时，而且须是延续性动词。
接时间状语从句：如 I have loved her since I met her last time. Lily has stayed at home since
she left school. 要求：主句的谓v .用现在完成时，而且须是延续性动词；从句的谓v.用一般
过去时，而且须是终止性动词。
(4)用于句型“It’s It has been + 一段时间 + since + 时间状语从句”中，译作“自从?以
来, 已经?(时间)了”。如 It’s has been three months since he moved to this city. 要求：主
句的谓v.用一般现在时或现在完成时；从句的谓v.用一般过去时，而且须是终止性动词。
(5)用于句型“一段时间 + has passed since + 时间状语从句”中，译作“自从?以来, ? (时
间)已经过去了”。如上个例句还可写成：Three months has passed since he moved to this city.
要求：主句的谓v.用现在完成时，而且动词必须是has passed；从句的谓v.用一般过去时，
而且须是终止性动词。
(6)注：当since用于否定句时，主句的谓v.可以是终止性动词。如 He hasn’t seen the film since
last month.
(7)相关词组：“从那时起”：ever since、since then、from then on. 注：ever since作为一个
词组，放句尾可单独使用。如I have given up smoking ever since. 另外，还可在since后接句
子。since前加ever，只是加重语气而已。如 I have given up smoking ever since I caught a bad
cough.
(8) since还可引导原因状语从句，译作“由于；因为”，相当于because。如 Since he was lazy,
he didn’t finish his homework.
therefore adv.因此, 所以=for that reason=consequently常用于连接两个并列分句，其前加
“and”或分号“;”。
He was ill, and therefore could not come. 他病了, 所以未能来。
He has broken his leg and therefore he can't walk.他摔坏了腿，因此不能走路了。
We do not have enough money. Therefore we cannot afford to buy the new car.我们的钱不够,因
此买不成这辆新车。
so conj. adv因而, 所以, 结果是
It was late, so we went home. 天晚了, 所以我们就回家去了。
He was sick, so they were quiet.他病了，所以他们很安静。
hence adv.因此, 从此
The town was built among the hills, hence the name Hilltown. 该城镇修建在群山之中,故取名'
山城'。
It is very late; hence you must go to bed.时间已经很晚了，因此你必须睡觉去。(记住前面是分
号，而不是逗号)
then adv因此，就 Go into the cave, then they won't see you. 躲进洞里去，那他们就看不到你
了。
5、accordingly adv.因此, 从而;所以，因此结果;因此(偶作连词使用conj.)
He was asked to leave the city and accordingly he went.有人叫他离开该城市,所以他就走了。
You may arrange accordingly.你可以权宜处理。
Mr Foster has never been to China. Consequently Hence he knows very little about it.福斯特
先生从未去过中国,所以对中国了解得很少。

My car was broken down and consequently I was late. = in consequence
Thus adv.如此，像这样;因此;于是
He sold his farm and thus he had enough money for his journey.他卖掉了农场，这样他就有足够
的钱旅行了。
There has been no rain - thus, the crops are drying.天没下雨，因此庄稼要枯死了。
already 和yet的区别用法
already 和yet都是表示时间的状语副词。都表示“已经”，也都用于完成时。但already 一
般用于肯定句中而yet一般用于否定句和疑问句中。
eg : I have already finished my homework . 我已经完成我的作业了。
Have you finished your homework yet ? 你已经完成作业了吗？
No , I haven’t finished it yet. 不，没完成。
as可用作连词，引导比较、时间、原因及方式等四种状语从句，应注意的是，引导的比 较
状语从句往往有省略;引导的时间状语从句一般用一般现在时而不用一般将来时;引导原因状
语从句时与“Because”和“since”引导的从句比较起起来语气最弱。
as作介词，意思时“作为”，“以??身份”。例如:He came to China as a tourist five years ago.
而表示像?一样时，like通常作介词用，而介词后面通常接名词，代名词和动名词。
as in Australia“和在澳大利亚一样”。
as??as AS +adj(原级)+AS AS +adv(原级)+AS
as soon as 一??就 as soon as possible 尽可能快地 as early as possible 尽可能早的
as carefully as you can 尽可能认真地
1。as是连词，表示“随着”的意义。lives是life的复数，意义是“生活”。
2。as是连词，表示“因为，由于”的意义。wanting是现在分词，表示主动意义，wanting to
buy cars=who want to buy cars。
As的用法小结 as可以作连词、介词及关系代词和副词。现将其用法小结如下:
、 as作连词的用法: 1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、 while
的用法区别。 ①下列情形时,只用as, 而不用when或while。 1)用于表示同一个人的两种
动作交替进行,指一边----一边. 如: The girl sings as she goes to school. He looked behind
occasionally as he went forward in the forest. 2)表示两个同步发生的动作或行?意思是随着-----
的发展.如: As time went on by, she became more and more beautiful . As children get older,
they become more and more interested in everything. 3)表示两个短暂行为或事情几乎同时发
生.如:I watched her as she read the book. I thought of it just as you opened your mouth. Just as
the flying worm hit her face, she gave a loud cry. 4)接在名词后面表示某一个年龄段时.如: As a
young man, he was active in sports. ②when作当??的时候解,可以指较短的(一点)时间,也
可指一段时间。如:When I was at college, I could speak several foreign languages. When the
clock struck twelve, I had slept for 2hours. ③ while常表示一段较长的时间或一个过程,强调
主句谓 语动词与从句谓语动词同时发生。如:Work while you work. Play while you play.
As =Since 作既然、由于解,引导原因状语从句,常用来表示已为人们所知或显而易见的原
因或理由。如: As he’s been ill for ages, I will help him. As Since you're not feeling well, you may
stay at home. As he wasn't ready , we went without him.
As =in the way that作像、按照??的方式解,引导方式状语从句。如: Do as I told you.
Remember, you must do everything as I do.
用于as--- as或not so as ---- as中,前一个as是副词,后一个as是连词,引导比较状语从句。
如:They helped the old as much as possible. I don't speak English so as well as she does.
表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为: adj. adv. n.+as +主语+谓语+主

句。如: Young as he is, he knows much. Tired as they were, they walked on.
表示也 ------一样。 She is a doctor, as was her husband. (二)、 as作关系代词,引导定语从句,
表示正如,这一点.如: He is very careful, as we all know. As is well-known, Taiwan belongs to
China. 另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如: Such a clever
girl as she can learn anything quickly. I was reading the same book as he bought yesterday.
as作介词的用法. 1.表示好像。如:He dressed as a policeman. 2. 表示作为当作。如:I found a job
as a guide. 3. 当某人是某身份时。如:As a child , she was sent to abroad. 4. as引导的介词短语
大多用作状语,as译为作为少数情况可引起宾语补足语。如: As a Party member, I'll take the
lead in everything. (状语) She works as a model. (状语) She has me as one of her best friends.(引
起宾语补足语) (
作副词的用法 1 表示与------等同。如:This dress is twice as expensive as that one. 2 像，如等。
如:As before, he remained unmoved.
although 与 though的用法区别
用作连词 表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式: Though
[Although] it was raining，we went there. 虽然下着雨，但我们还是去了那儿。
Though [Although] it was barely four o’clock, the lights were already on. 尽管才四点钟，灯已
经亮了。
Though [Although] we are poor, we are still happy. 我们虽然穷，仍然很快活。
二、用作副词 although 一般不用作副词，而 though 可用作副词，且一般放在句末(不放
在句首)，意为“可是”、“不过”: It’s hard work; I enjoy it though. 工作很辛苦，可是我乐
意干。 He is looking fit, though. 但他看起来很健康。 You can count on him, though. 不过你
可以指靠他。 三、用于习语 在 as though(好像，仿佛)，even though(即使，纵然)等固定短
语中不能用 although: She closed her eyes as though she were tired. 她闭上眼，仿佛很疲劳似
的。 We felt as though we had witnessed the whole thing. 我们感到仿佛目击了整个这件事似
的。 He is an honest man, I must say, even though I have opposed him. 尽管我反对过他，我还
得说他是一个诚实的人。 She was always afraid of men, even though she had lots of boyfriends.
尽管她有很多男朋友，她总是害怕男人。
四、用于倒装 though 引导的让步状语从句可用部分倒装的形式(注意:倒装后位于句首的名
词之前不用冠词)，但 although 一般不这样用: Poor though I am, I can afford it. 我虽穷，但这
东西还是买得起的。 Child though he was, he did quite well. 他虽是孩子，但干得很好。 另
外注意: 1. although较正式，语气强 Although he was tired, he went on working. 2. although引
导的从句放在主句前后均可，有时还可放在句中。 Although many difficulties are still ahead,
we are determined to make greater achievements. 尽管在前面的道路上还有许多困难，但是，
我们决心要取得更大的成就。 He often helps me with my English although he is quite busy. 尽
管他相当忙，但是还常常帮我学英语。 3. although引导的从句不能与but, however连用，
但可与yet, still连用。不能说:Although he was old, but he worked hard. 应把but去掉。当然，
保留but而去Although也可。 注意:although 的几不: although不能指假设的情况 although
不能作并列连词 although不能作副词，放在词尾常用连词介绍