包括before,after,when,while,as,since,till,until,once,as soon as 等。如：
Did anyone call when I was out?
We have known each other since we were children.
You’ll feel better after you take the pills.
Make sure that all the lights are off before you go to bed.
Don’t promise him anything till we’ve had time to think about it.
即由名词词组充当引导词，包括the moment,the minute,the second,the instant 等(均表示“一……就……”。如 ：
I loved you the instant (that) I saw you.
Tell me the moment (that) you get the results.
I came immediately you called.
Directly I walked in the door I smelt smoke.
主是几个涉及time短语,如every time,each time,(the) next time,any time,the last time,the first time 等。如：
Next time you come in,please close the door.
My roof leaks every time it rains.
He felt nervous each time she spoke to him.
The last time we talked he said he needed another two days.
包括no sooner…than,hardly…when 等。如：
I had no sooner closed the door than somebody knocked.
Hardly were the words uttered when he began to regret them.