(1) Subject Clauses
That he has helped me is a fact.
Whether she will arrive in time is not certain.
How the thief stole in last night remains a mystery.
What we are doing today is something new and special.
It is not certain whether she will arrive in time.
(2) Complement Clauses (Predicative Clauses)
The fact is that he is really working hard every day.
This is what I am looking for.
This is who I met at the airport.
That is where we change from bus to train.
That was just when they came to visit us from the USA.
China is no longer what it used to be.
(3) Object Clauses
I know (that) China is our motherland.
People used to say (that) the early bird catches the worm.
He hasn’t asked why she can’t solve this problem quickly. Nobody can tell whether [if] the director will sign the document. She reminded me that I should make some comments at the meeting. The doctor suggested to him that he should give up smoking.
You must show them what you are carrying at the Customs.
(4) Attributive Clauses (Adjective Clauses)
You can get the novel that [which] is lying on the table.
Do you know the man who [that] is standing by the door?
This is the most useful book (*) I’ve ever read. (*that / which) All (*) you have mentioned is very reasonable. (* that)
He is a very famous professor (*) many people respect. (* whom / that) This is the boy whose mother is our teacher.
That man wore an old jacket whose sleeves were worn-out.
Can you see the house whose door is wide open?
There are times when I miss my family very much.
Which is the department where you work?
He didn’t tell me the reason why he refused our offer.
(5) Adverbial Clauses( Adverb Clauses),
A. Time (時間) : when, whenever, as, while, before, after, since, until, till, now (that), once, as soon as… People greet the famous singer whenever he appears.
Every morning he jogs a mile or two before he goes to work.
Where have you been...