引导词：when,while,as,as soon as,the moment,the minute,the second,the instant,no sooner...than,hardly/scarcely...when,immediately,directly,instantly,till,until,not...until,before,since...
I was reading when he suddenly came in.
Can you water my plant while i am away?
He is listening music as he does his homework.
The moment I see him I fall in love with him.
No sooner had we gone home than the taxi left.
You may stay here till/until the rain stops.
Not until he left did she find that he is a very nice person.
Please write it down before you forget it.
It will be 2 years before he come back.
It is three years since we broke up.
It is one years since we stay together.
Where there is a will, there is a way.
Wherever there is smoke, there is a fire.
You’d better leave a mark where you want to pay emphasis on.（状语从句）
You’d better leave a mark at the place where you want to pay emphasis on.（定语从句）
引导词;because,as,since,now that,seeing that,considering that
I like the boy because he is cute.
As it is raining, we shall not go outside.
Now that/since you like him, you should tell him at once.
引导词：so that, in order that,for fear that,in case,lest
I will wait for you so that you can follow me.
Take your umbrella in case/lest it should rain.
I wear the read dress so that you can find me at the first glance.
引导词; so that,so...that,such...that
The young woman is so beautiful a gril that every one likes her.
The young woman is such a beautiful girl that every one likes her.
引导词：if, unless,so long as,only if,supposing that,in case that,on condition that等
I will marry him if he agrees.
You will make it as long as you keep on trying.
引导词：as, as if, as though
Do as your girlfriend tells you, or you’ll be sad.
She treats that boy as if he were her man.
引导词有although,though,even though, even if,as 等
She is unhappy although she is beautiful and rich.
Even though/if it rains, i still go running.
Child as she is, she knows a lot of history.
Try as she might, she couldn’t win his heart.
Whether you believe it or not, she still love him.
Whatever you do, he won’t stay here for you.
引导词：as, than,the more...the more,more than,so much as
She is as beautiful as her mother.
The more you exercise, the more beautiful you are.
The movie is as good as i have expected.