如：Just as/Just when/When I stopped my car, a man came up to me.
如：When you have finished your work, you may have a rest.
如：As the day went on, the weather got worse.
肯定句例句：I slept until midnight. 我一直睡到半夜时醒了。
Wait till I call you. 等着我叫你。
注意：在肯定句中可用before代替：Let's get in the wheat before the sunsets.
否定句例句：She didn't arrive until 6o'clock.
I didn't manage to do it until you had explained how.
例句：Until you told me, I had heard nothing of what happened.
例句：Until when are you staying? 你呆到什么时候？
例句：Not until the early years of the19th century did man know what heat is.
2）It is not until…that…
表示时间的状语从句可由when, as, while, whenever, after, before, till(until), since, once, as soon as(或the moment), by the time, no sooner…than, hardly(scarcely)… when, everytime等引导。
e.g. When I came into the office, the teachers were having a meeting.
He started as soon as he received the news.
Once you see him, you will never forget him.
No sooner had I gone to bed than I went to sleep.
原因状语从句是表示原因或理由的，引导这类从句的最常用的连词是because, since, as, nowthat（既然）等，for表示因果关系时（它引导的不是从句）为并列连词，语气不如because强。 e.g. He is disappointed because he didn't get the position.
As it is raining, I will not go out.
Now that you mention it, I do remember.
e.g. Sit wherever you like.
Make a mark where you have a question.
引导目的状语从句最常用的词（组）是so, so that（从句谓语常有情态动词）, in order that, in case（以防，以免）等。
e.g. Speak clearly, so that they may understand you.
She has bought the book in order that she could follow the TV lessons.
He left early in case he should miss the train.
结果状语从句是表示事态结果的从句，通常主句是原因，从句是结果。由so that（从句谓语一般没有情态动词）,so…that, such…that等引导。
e.g. She was ill, so that she didn't attend the meeting.
He was so excited that he could not say a word.
She is such a good teacher that everyone admires her.
引导条件状语从句的词（组）主要有if, unless, so(as)long as, on condition that, so(as) far as, if only(=if)。
e.g. If he is not in the office, he must be out for lunch.
You may borrow the book so long as you keep it clean.
So far as I know（据我所知）, he will be away for three months.
You can go swimming on condition that(=if) you don't go too far away from the river bank.
If he had come a few minutes earlier, he could have seen her.
让步状语从句可由although, though, as, even if(though), however, whatever, whether…or, no matter who(when, what,…)等引导。
e.g. Though he is a child, he knows a lot.
Child a she is, he knows a lot.
Whatever(=No matter what) you say, I'll never change my mind.
方式状语从句常由as, as if(though), the way, rather than等引导。
e.g.You must do the exercise as I show you.
He acted as if nothing had happened.
比较状语从句常用than, so(as)…as, the more…the more等引导。
e.g. I have made a lot more mistakes than you have.
He smokes cigarettes as expensive as he can afford.
The busier he is, the happier he feels.
e.g. We'll go outing if it doesn't rain tomorrow.
I'll write to you as soon as I get to Shanghai.
e.g. When(hewas) still a boy of ten, he had to work day and night.
If(you are) asked you may come in.
If(it is) necessary I'll explain to you again.
e.g. You are to find it where you left it.（地点状语从句）
Tell me the address where he lives.（定语从句，句中有先行词）
I don't know where he came from.（宾语从句）
Where he has gone is not known yet.（主语从句）
This place is where they once hid.（表语从句）
注意：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。
例句：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.
例句：Hardly/Scarcely had I got home when it began to rain.
No sooner had I got home than it began to rain.