since和until可以连用吗_百度知道
since和until可以连用吗
你好，很高兴为你解答since与完成时连用，since后➕一般过去式 自从until与not连用 直到…才…希望对你有帮助
来自团队：
其他类似问题
为您推荐：
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁since和for的使用方法_百度知道
since和for的使用方法
如果用since和for填空 那么
since+表示过去的时间状语for+一段时间如果是a night,应该用for
其他类似问题
为您推荐：
其他2条回答
总之就是点时间）　　　I have been waiting for you for 2 hours.而for加一段时间E,last year之类.00a，诸如此类的还有yesterdaysince加一点时间.00就是点时间.m(7,那时间是一个点.(2 hours 就是一段时间．诸如此类的还有２　years: I have been waiting for you since 7.g
一、延续性动词和终止性动词的概念
英语中，动词按其动作发生的方式、动作发生过程的长短，可分为延续性动词和终止性动词。
延续性动词表示能够延续的动作，这种动作可以延续下去或产生持久影响。如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。
终止性动词也称非延续性动词、瞬间动词或短暂性动词，表示不能延续的动作，这种动作发生后立即结束。如open, close, finish, begin, come, go, arrive, reach, get to, leave, move, borrow,buy等。
二、延续性动词的用法特征
1.延续性动词可以用于现在完成时，其完成时态可与表示&段时间&的状语连用。表示&段时间&的短语有：for two years, during the past three years, since last y...
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁复合句_百度百科
关闭特色百科用户权威合作手机百科
收藏 查看&复合句
复合句（Complex Sentence）分为并列复合句和主从或从属复合句，并列复合句是有：and、or、but连接；从属复合句由一个主句（Principal Clause)和一个或一个以上的(Subordinate Clause)构成。用作，主句是全句的主体，通常可以独立存在；从句则是一个，不能独立存在。从句不能单独成句，但它也有部分和部分，就像一个句子一样。所不同在于，从句须由一个（connective）引导。 根据引导从句为主不同大大可分为：、、、、等。
从属复合句可分为：
1).（The Attributive Clause）；
2).（The Adverbial Clause）；
3).（The Noun Clause）；在句中作定语，用来修饰一个名词、名词词组或者。被修饰的名词、名词词组或叫做；
在先行词和之间起连接作用的词叫做。
引导词分为“”和“”。有：who, whom, whose, that, which, as。
有：when, where, why。 注意：关系副词里面没有how。
如果要修饰方式，用that或in which引导，或者不用。
I don’t like the way (不用引导词.that, in which) he eyed me.
我不喜欢他看我的那个样子。关系代词who在中主要作，在非正式语体里who还可以作从句中的。
He is the man who wants to see you.
He is the man who I saw in the park yesterday.He is the man（whom）I saw in the park yesterday.
（whom在从句中作）whose 用来指人或物，（只能用作定语, 若指物，它还可以同of which互换）。
They rushed over to help the man whose car had broken down.
Please pass me the book whose cover is green. （of which the cover/the cover of which）which指物，在从句中作或，作宾语时在非正式语体中可以省略。
They needed a plant which didn't need as much water as rice.
The farm (which) we visited yesterday is located in the suburb of Beijing.当在which和that面前进行选择的情况下，一般情况下要选which：
1.在中通常用which作，而不能用that做非限制性定语从句的引导词。
2. 修饰整个主句。
I never met Julia again after that, which was a pity.
3. 修饰部分。
He can swim in the river, which I cannot.
They are all questions to which there are no answers.that多用来指物，有时也可以用来指人；在中作主语或宾语。指物的时候多用that，也可用which。
It’s a question that (which) needs careful consideration.
（指物，作。）
Who is the man that is reading a magazine under the tree?
（指人，作主语。）
The girl (that) we saw yesterday is Tom’s sister.
（指人，作，可省略。）在以下的情况中，只能用that作，而不能用which作引导词。
1.为all , everything, anything, nothing, little等时。
All(that)she lacked was training.
2.先行词被形容词最高级修饰时
This is the best film that I have ever seen.
3.先行词被和the last修饰时
4.中既有人又有物时
They talked about the teachers and the schools that they had visited.
5.主句是含有who或which的特殊，为了避免重复时通常由where, wherever 引导。
Where I live there are plenty of trees.
Wherever I am I will be thinking of you.通常由as, (just) as…so…, as if, as though引导。
1） as, (just) as…so…引导的方式状语从句通常位于主句后，但在(just) as…so…结构中位于句首，这时as从句带有比喻的含义，意思是&正如…&，&就像&，多用于正式文体，例如：
Always do to the others as you would be done by.
你希望人家怎样待你，你就要怎样待人。
As water is to fish, so air is to man.
我们离不开空气，犹如鱼儿离不开水。
Just as we sweep our rooms, so we should sweep backward ideas from our minds.
正如打扫房屋一样，我们也要扫除我们头脑中落后的东西。
2） as if, as though
两者的意义和用法相同，引出的多用，表示与事实相反，有时也用陈述语气，表示所说情况是事实或实现的可能性较大。汉译常作&仿佛……似的&，&好像……似的&，例如：
They completely ignore these facts as if (as though)they never existed.
他们完全忽略了这些事实，就仿佛它不存在似的。（与事实相反，用。）
He looks as if (as though)he had been hit by lighting.
他那样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。）
It looks as if the weather may pick up very soon.
看来天气很快就会好起来。（实现的可能性较大，谓语用陈述语气。）
说明：as if / as though也可以引导一个短语、或无，例如：
He stared at me as if seeing me for first time.
他地看着我，就像第一次看见我似的。
He cleared his throat as if to say something.
他清了清嗓子，像要说什么似的。比较：because, since, as和for
1） because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是的或已为人们所知，就用as或 since。
I didn't go, because I was afraid.
Since /As the weather is so bad, we have to delay our journey.
2） 由because引导的如果放在句末，且前面有逗 号，则可以用for来代替。但如果不是说明直接原因，而是多种情况加以推断，就只能用for。
He is absent today, because / for he is ill.
He must be ill, for he is absent today.表示目的的从句可以由that, so that, in order that, in case等词引导，例如：
You must speak louder so that /in order that you can be heard by all.
Better take more clothes in case the weather is cold.常由so… that 或 such…that引导，掌握这两个，首先要了解so 和 such与其后的词的搭配规律。
比较：so和 such
其规律由so与such的不同词性决定。such 是形容词，修饰名词或名词词组，so 是，只能修饰形容词或副词。 so 还可与表示数量的形容词many, few, much, little连用，形成固定搭配。
so foolish, such a fool
so nice a flower, such a nice flower
so many / few flowers, such nice flowers
so much / little money, such rapid progress
so many people, such a lot of people
（ so many 已成固定搭配，a lot of 虽相当于 many，但 a lot of 为名词性的，只能用such搭配。）
so…that与such…that之间的转换既为 so与such之间的转换。
The boy is so young that he can't go to school.
He is such a young boy that he can't go to school主要有 if, unless, as/so long as, on condition that 等。.
if 引导的有和两种。非真实条件句已在中阐述。
unless = if not.
Let's go out for a walk unless you are too tired.
If you are not too tired, let's go out for a walk.连接时间状语从句的连接词有：when, before, after, while, as soon as, until, since...... 这里要注意一点的 是，如果主句是，从句只能用表示将来意义。though, although
注意：当有though, although时，后面的不能有but，但是 though 和yet可连用
Although it's raining, they are still working in the field.
3) even if, even though. 即使
We'll make a trip even though the weather is bad.
4) whether…or- 不管……都
Whether you believe itornot, it is true.
5) &no matter +疑问词& 或&疑问词+后缀ever&
No matter what happened, he would not mind.
Whatever happened, he would not mind.
替换：no matter what = whatever
no matter who = whoever
no matter when = whenever
no matter where = wherever
no matter which = whichever
no matter how = however
注意：no matter 不能引导和。
（错）No matter what you say is of no use now.
（对）Whatever you say is of no use now.(无论你说什么都是无用的）
你现在说什么也没用了。(Whatever you say是主语从句)
（错）Prisoners have to eat no matter what they're given,
（对）Prisoners have to eat whatever they're given. 囚犯们只能给什么吃什么。1）as, when 引导短暂性动作的动词。
Just as / Just when / When I stopped my car, a man came up to me.
2）当的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或 while。
When you have finished your work, you may have a rest.
3）从句表示&随时间推移&能用as，不用when 或while。
As the day went on, the weather got worse.
日子一天天过去，天气越变越坏。这两个连词意义相同。肯定形式表示的意思是&做某事直至某时&，动词必须是延续性的。否定形式表达的意思是&直至某时才做某事&。动词为延续性或非延续性都可 以。 正确使用这两个连词的关键之一就在于中的动词该用肯定式还是否定式。
I slept until midnight. 我一直睡到半夜时醒了。
Wait till I call you. 等着我叫你。
（在肯定句中可用before代替 Let's get in the wheat before the sun sets.）
She didn't arrive until 6 o'clock.
Don't get off the bus until it has stopped.
1)Until可用于句首，而till通常不用于句首。
Until you told me, I had heard nothing of what happened.
直到你告诉我以前，出了什么事我一点也不知道。
2)Until when中，until要放在句首。
---Until when are you staying? 你呆到什么时候？
---Until next Monday. 呆到下周一。
注意：可用另外两种句式表示。
(1)Not until …在句首，主句用。
Not until the early years of the 19th century did man know what heat is.
直到19 世纪初，人类才知道热能是什么。
Not until I began to work did I realize how much time I had wasted.
直到我开始工作，我才认识到了我已蹉跎了几多岁月。
(2) It is not until… that…
10 表示&一…就…&的结构
hardly/scarcely…when/before, no sooner…than 和as soon as都可以表示&一…就…&的意思，例：
I had hardly / scarcely got home when it began to rain.
I had no sooner got home than it began to rain.
As soon as I got home, it began to rain.
注意：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构：
Hardly / Scarcely had I got home when it began to rain.
No sooner had I got home than it began to rain.在复合句中充当成分的句子叫做主语从句。常规，即句子在复合句中充当一个主语。主语从句的：不受主句的时态影响和限制。（1）That he finished writing the composition in such a short time surprised us all.（2）Whether we will go for an outing tomorrow remains unknown.（3）Who will be our monitor hasn't been decided yet.（4）Whom we must study for is a question of great importance.（5）What caused the accident remains unknown.（6）Whatever you did is right.（7）Who the watch belongs to is unknown.（8）What we need is time.（9）What we need are good doctors.小结:（1）引导从句有that,whether,who,what,whatever等（2）连词位于句首不能省略（3）主语从句大多数情况下视为，但也有例外，如例（9）
注意： 当what引导的名词性分句作主语时，问题极为复杂。著名学者教授在论文《关于what-分句作主语的主谓一致问题》中就这一问题做了深入研究，并给出了10种的主谓一致关系。这些一致关系值得英语学习者和使用者特别注意。在句子中起作用的叫做宾语从句。宾语从句的和的引导词相同。宾语从句可以作的宾语，作短语动词的宾语，的宾语。
宾语从句的引导词有三种情况:
1)引导陈述意义的 句子用that，无实际意义，口语中可以省略。
2）表示“是否”的 意义时用whether或if （当句中有or是只能用whether而不用if）
3）引导特殊疑问句意义的句子时用特殊疑问词who, whose, whom, which, what, when, where, 或how.
宾语从句的语序:无论什么引导词，表达陈述还是疑问，宾语从句都必须用陈述语序。
宾语从句的时态:
主句是一般现在时，从句根据需要选用相应的时态，主句的谓语是一般过去时，从句的谓语动词在时态上要用相应的过去时态，（若从句表示的 是客观真理或自然现象，不论主句时态，从句都用一般现在时态）。
·宾语从句：及物动词的宾语
Everybody knows that money doesn't grow on trees.
·宾语从句：短语动词的宾语
Please go and find out when the train will arrive.
·宾语从句：介词的宾语
I am interested in what she is doing.
·：否定的转移
I don't suppose you're used to this diet.
我想你不习惯这种饮食。·从句
在句子中起表语作用的叫做。表语从句的引导词和主语从句的引导词相同。
What the police want to know is when you entered the room.
This is what we should do.
That's why I want you to work there.
as if, as though, because也可用来引导表语从句。
She seems as if she had done a great thing.
It is because you eat too much.
是idea, notion, proposal, suggestion, request等名词时,作表语从句的动词为原形动词或should+原形动词。
My suggestion is that we (should) go and help him.
Our only request is that this should be settled as soon as possible.· 同位从句一般跟在某些名词如answer(答案)，hope(希望)，fact(事实)，belief (信仰)，news(消息)，idea(主意；观念)，promise(承诺)，information(信息)，conclusion(结论)，order(命令)， suggestion(建议)，problem(问题)，thought (想法)等后面。例如：
I had no idea that you were here.
She told us her hope that she would become a pianist.
He made a promise that he would never come late.
·：whether
whether可以引导同位语从句，而不能用whether作为。
He hasn’t made the decision whether he will go there.
I have small doubt whether he is suitable for the job.
·同位语从句：what
what可以引导同位语从句，而定语从句不能用what作为引导词
I have no idea what he is doing now.
how可以引导同位语从句，而不能用how作为
It’s a question how he did it
新手上路我有疑问投诉建议参考资料 查看until、after、before和since的区别、用法和意思_百度知道
until、after、before和since的区别、用法和意思
谢谢每一个回答我的问题的人
提问者采纳
until（till)意思是：直到~~，放在动词后面，常用词组有：not~~until~~~意思是直到~~~才~~~,例如:I walk until down this street.我沿这这条街一直走。after意思是：~~过后，例如：after sclool放学后before意思是：在~~以前，是从现在算起的时间，例如：I will be home befo珐郸粹肝诔菲达十惮姜re school.放学前我将回到家。since意思是：在~~以前，是从以前开始算的时间，例如：I have been an English teacher since 2001.我从2001年开始做英语老师。
提问者评价
谢谢，希望以后更详细
其他类似问题
为您推荐：
您可能关注的推广回答者：
until的相关知识
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁before/after/until/when/as/since的区别与用法_百度知道
before/after/until/when/as/since的区别与用法
从此以上区别就可以了1在·····之前2在····之后3直到4当···时候5像····一样6从····
其他类似问题
为您推荐：
until的相关知识
其他1条回答
ntil。有时候也做介词:直到…：在…之前。While。before：not…until解释：直到…才结束：而且，条件的）since解释。相关词组！as接条件状语。如1999。（表示原因：正当做…：从…开始：常解释，十六世纪三十年代。他跟的是时间点：正如：当…时候：解释。when
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁}