§ Noun Clause
(1) 從屬連詞 Subordinate Conjunction
(2) 連接代名詞 Connective Pronoun
(3) 連接形容詞 Connective Adjective
(4) 連接副詞 Connective Adverb
1. 從屬連詞 Subordinate Conjunction
有：(1) that；(2) if；(3) whether…or。
That he has gone is untrue.
The government announced that the danger was past.
* 名詞從句作賓語時，"that" 可隱藏：
The government announced the danger was past.
Can you speak Japanese?
I ask if you can speak Japanese?
I don't know whether he will go or not.
I don't know whether he will go or (whether he will) not (go).
2. 連接代名詞 Connective Pronoun
Who are you?
I ask who you are.
Can you tell me who the girl in the street is?
I do not know who sits on that chair.
Who will be the president of America next time is unknown.
Whom does your mother teach in the room?
I ask whom your mother teaches in the room.
Tell me whom you associate with and I tell you who you are.
Whose is that car?
I ask whose that car is.
What is your father?
Can you tell me what your father is?
What happens today will become history tomorrow.
The important thing is what a person does, not what he
Can you tell me which of these two babies is yours?
I do not know by which of the two roads he goes to school.
I will give this book to whoever wants it.
* "whoever" 指「無論誰人」，亦是連接代名詞。
Choose whichever you want.
* "whichever" 指「無論哪個」，亦是連接代名詞。
Take whatever you need.
* "whatever" 指「無論什麼」，亦是連接代名詞。
3. 連接形容詞 Connective Adjective
有： (1) what；(2) which；(3) whose。
What book is this?
I do not know what book this is.
Which dog is mine?
I ask which dog is mine.
Whose cat is that?
Can you tell me whose cat that is?
4. 連接副詞 Connective Adverb
有：(1) when；(2) where；(3) why；(4) how。
When he will come home is not yet known.
When we should hold the meeting is still under
I told him where he could find the answer.
Where we will go is the question.
That is why he loves her so much.
I do not know why he broke off in the middle of a sentence.
Can you tell me how you go?