时间状语从句clause of time
   常用连词：when ,while as, till, until, whenever, after before, by the time that, not…..long before,
   Hardly/scarcely/barely…when (before) / no sooner…than （一。。。就）
   As soon as /? directly (when ) Immediately ( when / after) /
   the moment ( that ) the instant ( that ) / the minute (that ) （一。。。就）
   e.g. The moment he saw me, he ran away.
   Hardly had I returned when I bought a fine house.
   They didn’t go home until they had finished the work.

地点状语从句 clause of place
   常用连词：where , wherever, everywhere (that) (无论。。。地方) / anywhere ( that ) (无论。。。地方)
   e.g. I found my books where I left them.
   They went wherever they could find work.
   Change the form where necessary.

原因状语从句clause of reason
   常用连词：because, as, for, since, now that(既然), considering that(既然)seeing that（鉴于）, in that （因为）
   e.g. Since Albert is late, let’s begin without him.
   The book is interesting because it has many stories of adventure.
   There must be no one in the house for the door is closed.
   Seeing that I shall be here again tomorrow, I won’t wait any longer.
   Now that we have finished the course, we shall start doing more revision work.

其它形式的连接词
   He left on the grounds that he was ill.
   Wine is scarce here by the reason that it is prohibited.
   Owing to the rain, the match was canceled.
   We delayed our departure on account of bad weather.
   In view of the heavy rain, we will put off the outing.
   Thanks to my illness, I have the opportunity to improve my character.

条件状语从句 clause of condition
   常用连词：if , unless, as(so) long as , in case, if only (只要，假如), on condition that (只要，假如)? Suppose (that)/ supposing that / provided (that) / providing (that) (假如)
   e.g. Unless you go there early, there won’t be much a chance of getting a ticket.
   I’ll travel around the world if I earn a lot of money.
   If in doubt, ask a policeman.
   I will come provided that I am well enough.
   Supposing you fell in love with your boss, what would you do?
   You are welcome to stay with us as long as you share the rent.
   In case Mary comes, please tell her to come to my office.

目的状语从句 clause of purpose常用连词：
   表示肯定目的 that (so that, in order that) …may (might) （为了。。。，以便。。。）
   表示否定目的 lest ( for fear that, in case that) …should ( 以免，惟恐，为了不)
   e.g. They started early in order that they might arrive before dark.
   People evacuated the building lest the wall should collapse.
   They hid themselves behind some bushes for fear that enemy should find them.

结果状语从句clause of result
   常用连词： so….that (如此。。。以致) such… that (如此。。。以致)
   So bright was the moon that the flowers were bright as by day.
   I was in the bath, with the result that I didn’t hear the telephone.
   What have I done that you should be so angry with me?

让步状语从句 clause of concession
   常用连词：although (though) as （虽然，尽管）even if ( even though ), however, whatever (不管) , no matter ( how, what, where, when) , whether…or?
   e.g. They will stand by you even if you don’t succeed.
   Although he has a lot of money, yet he is unhappy.
   Whoever spits in a public place will be fined.
   No matter how busy the professor is, he often takes time off to give talks on popular science.
   While I admit his good points, I can see his shortcomings.
   Child as he is, he knows a great deal.

方式状语从句clause of manner
   常用连词：as, just as…so, as if (as though ) according as (依照)
   e.g. Please do exactly as your doctor says.
   As you make your bed, so you must lie in it.（自作自受）
   It looks as if it is going to rain.
   The music sounds as if it is African.
   He jumped back as if he had been stung.
   The young man with long hair looks as if he were a girl.

比较状语从句clause of comparison
   常用连词：The….the, than, as…as not so( as)….as
   e.g The more he explained, the more confused I felt.
   This work is more difficult than we thought.