請問一些英文grammar怎样用

COULD:
1. can的過去式
She could play the violin when she was five.
她五歲時便能拉小提琴了。
2. (用於假設語氣,表示與事實相反的設想)能,可以
I wish I could go to France.
但願我能去法國。
I would go if I could.
能去我就去。
3. (表示可能性)可能
That could be my train.
那可能是我要乘的火車。
4. (用於婉轉語氣)能,可以
Could I smoke here?
我可以在這裡抽煙嗎?
Couldn't you try it again?
你可否再試一下?
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WOULD:
1. (will的過去式,表示過去未來式)將
She said she would come.
她說過她會來的。
2. (表示意志)願,要;偏要
I told her to stop nagging, but she just wouldn't listen.
我叫她別再嘮叨,可她就是不聽。
3. (表示過去的習慣)總是,總會
He would sit silent for hours.
他常常接連好幾個小時默默地坐著。
4. (表示推測)大概,會
I think he would accept the invitation.
我想他會接受邀請的。
5. (表示喜歡,意願)願意,要,想
I would like to have a word with you.
我想同你說句話。
6. (表示虛擬,假設,條件等)要,將要;會,就會
If I were younger, I would join you in the expedition to the Antarctic.
如果我年輕些,我就會跟你們一起去南極探險。
7. (表示婉轉的請求)請
Would it be convenient for you to leave tomorrow?
明天走你方便嗎?
Would you please come tonight?
你今晚來一下好嗎?
8. (表示願望)但願,要是...多好
I wish you wouldn't smoke any more.
我希望你別再抽煙了。
9. 能,能夠
The hall would seat one thousand people.
這個大廳能坐一千人。
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WILL:
1. (表示單純的將來)將
He will be home at six.
他六點回家。
2. (表示意志,意願)願,要
You will come, won't you?
你會來的,是不是?
3. (表示經常性,習慣性)經常,慣於,總是
These things will happen.
這種事總是要發生的。
4. (表示能力,功能)能
This auditorium will seat one thousand people.
這個禮堂能容納一千人。
5. (表示猜測)可能,大概
This will be the house you're looking for.
這大概就是你找的那所房子了。
6. (表示責任,義務)必須,一定
No one will leave the examination room before ten o'clock.
十點以前誰也不能離開考場。
vt.
1. 用意志力使,主觀促成[O2][+(that)]
I tried with all my might to will him to say no.
我竭盡全力想使他說不。
2. 遺贈[O1][(+to)]
He willed his house to his nephew.
他立下遺囑,把房子留給姪子。
3. 意欲,決心要
vi.
1. 下決心
2. 願意
n.
1. 意志,毅力;自制力[C][U]
Jim has a strong will.
吉姆是個意志堅強的人。
2. 心願;目的;意願[U][+to-v]
He had a strong will to beat his opponent.
他有擊敗對手的強烈慾望。
3. 決心;意圖[S]
She had no will of her own.
她這人沒有主見。
4. (對別人所抱的)情感[U]
They bear you no ill will.
他們對你並無惡意。
5. 遺囑[C]
In her will she left all her money to her children.
她在遺囑中將其所有的錢留給子女。
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CAN:
1. (表示能力,功能)能,會
The classroom can seat thirty students.
這教室能坐三十位學生。
June can drive now.
朱恩現在會開車了。
2. (表示可能性)可能,可能會
I think the work can be completed ahead of time.
我認為這項工作能提前完成。
3. (表示允許,請求)可以
You can't take the book out of the room.
你不可以將這本書拿出室外。
Can I use your pen?
我可以用一下你的筆嗎?
4. (表示命令)必須
If you won't keep quiet you can get out.
你如不保持安靜,就請你走。
5. (表示偶然發生的可能性)有時會
It can be quite windy there, especially in spring.
那裡有時容易刮風,特別在春季。
6. (表示驚訝)究竟;竟至於
What can it possibly be?
到底那是怎麼一回事?

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MAY:
1. (表示可能性)可能,也許
She may be a nurse.
她可能是個護士。
2. (表示許可或請求許可)可以
"May I come in?" "Yes, please."
"我可以進來嗎?" "請。"
3. (表示希望,祝願等)祝,願
May you succeed!
祝你成功!
4. (表示讓步)無論;儘管
We will stand by you, come what may.
不管發生什麼事,我們都會支持你們。
5. (表示目的)(以便)能,(使...)可以
They try to cure the disease so that people may live longer.
他們設法根治該病以便使人們活得更長些。
6. (常與well連用,表示有充分的理由)(完全)能,(滿)可以
You may well say so.
你完全可以這麼說。
7. (用於問句中,表示不確定)會,究竟
Who may the man be?
這個人會是誰呢?
8. (表示期望)能夠,會
We hope she may win.
我們希望她會獲勝。
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SHALL:
1. (用於第一人稱,表示將來)將,會
I shall be thirty next year.
明年我就三十歲了。
2. (用在問句中表示徵求對方意見,主要用於第一,第三人稱)...好嗎?要不要...?
Shall we begin now?
我們現在開始好嗎?
Shall I wait outside?
我在外面等好嗎?
Shall I turn on the lights?
我開燈好嗎?
3. (用於陳述句中的第二,第三人稱,表示說話人的意圖,允諾,警告,命令,決心等)必須,應,可
You shall have it back next week.
下星期一定還你。
He shall stay in bed.
他必須躺在床上。
He says he won't go, but I say he shall.
他說他不去,但我說他必須去。
4. (用在條約,規章,法令等文件中表示義務或規定,一般用於第三人稱)應,必須
Intruders shall be punished.
非法闖入者將遭處罰
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SELDOM:
1. 不常,很少;難得
She seldom showed her feelings.
她很少表露感情。

1. 不常有的,很少的,難得的

excelent~!!+OIL~!

could,would 比較有禮貌同formal
will,can ,may 就casual d..
shall=will,不過shall通常都係講緊we個陣先會用
eg.Shall we go out for lunch now?
而且shall已經比較out-dated,所以用will都已經ok
seldom就係好小既意思
eg,My family seldom go out for lunch,we usually eat at home.