其他問題
書名, 國家名用單數:
Tales from Shakespeare is a book by Charles Lamb.
學科名, 如mathematics, economics用單數.
many a 或more than one 所修飾的詞作主語時, 謂語動詞多用單數形式:
Many a person has had that kind of experience.
More than one person has involved in the case.
a number of 后接復數, the number of 后接單數:
A number of books have been published on the subject.
The number of books published on the subject is simply amazing.
one of those 后用單數. 在“one of + 復數名詞 +關系分句”結構中,關系分句中謂語動詞的單復數形式在一般情況下有兩形式,一是根據先行詞采用復數形式:
Joan is one of those people who go out of their way to be helpful.
當one 之前友the only 等限定詞和修飾語時,關系分句謂語動詞根據one 而定,即采用單數形式:
He is the only one of those boys who is willing to take on another assignment.
Ⅱ 非謂語動詞
不定式
形式
主動形式 被動形式
一般式 to do to be done
完成式 to have done to have been done
進行式 to be doing
完成進行式 to have been doing
完成式: 不定式的一般形式所表示的動作, 通常與主要謂語表示的動作(狀態)同時(或幾乎同時)發生, 或是在它之后發生. 假如不定式所表示的動作, 在謂語所表示的動作(狀態)之前發生, 就要用不定式的完成式。
I am glad to have seen your mother (= I am glad I have seen your mother).
(比較: I am glad to see you.)
He is said to have written a new book about workers.
He pretended not to have seen me.
進行式: 如果主要謂語表示的動作(狀態)發生時, 不定式表示的動作正在進行, 這時要用不定式的進行式。
You are not supposed to be working. You haven't quite recovered yet.
We didn't expect you to be waiting for us here.
He pretended to be listening attentively.
完成進行式: 在謂語所表示的時間之前一直進行的動作, 就要用不定式的完成進行式.
The struggle was known to have been going for twenty years.
We are happy to have been working with you.