（1）表示出于職責(zé)、義務(wù)該做某事
You shouldn't come to such a decision hastily.
你不應(yīng)該匆匆忙忙地作出這么一個(gè)決定。
You should write to your parents at least once a month.
你應(yīng)該至少每月給你父母親寫一封信。
We should read English aloud every morning.
我們應(yīng)該每天早晨朗讀英文。
They should do it for their own good.
為了他們自己利益他們應(yīng)該做這件事。
（2）表示對(duì)某種情況的估計(jì)
She shouldn't be out in such an early morning.
她不會(huì)這么一大早就出去了吧。
The effect of the tax should be felt in higher prices.
人們可能會(huì)從各種上漲的物價(jià)中感覺到這種稅的影響的。
The event should lead them to a even worse economic crisis.這次事件可能會(huì)將他們引向更嚴(yán)重的經(jīng)濟(jì)危機(jī)。
This book should be published in two months at most.
這本書最多兩個(gè)月后就會(huì)出版的。
（3）表示驚訝、失望等情緒
I think it is dreadful that anyone should be so miserable.
我認(rèn)為，竟然每個(gè)人都如此傷心就太糟糕了。
Why should I pay him for nothing？ 我干嗎要無為地付給他錢？
It seems so unfair that this should happen to me.
這件事竟然發(fā)生在我身上似乎太不公平了。
It's strange that it should be so cold today.奇怪，今天怎么會(huì)這么冷。
（4）用于某些從句中表示虛擬語氣
The doctor insisted that the girl should be hospitalized.
大夫堅(jiān)持認(rèn)為那個(gè)女孩要住院治療。
If it had not been for the doctor's care the girl should not be speaking to you now.要不是由于大夫的精心照料，這個(gè)女孩現(xiàn)在就不能與你說話了。
She stood away so that he should enter the room first.
她讓到一邊，好讓他第一個(gè)進(jìn)入房間。
I'll write it down lest I should forget it 我將它記下以免遺忘。
Take an umbrella with you in case it should rain.
帶上雨傘，以防萬一下雨。
will ，would
（would可以看作是will的過去式，這兩個(gè)詞除了時(shí)態(tài)不相同外，在表達(dá)意思的許多方面是相近的。當(dāng)然will 和would又都有一些各自不同的獨(dú)特用法。）
（1）用于第二人稱疑問句，表示請(qǐng)求（在這種用法中would使語氣更為客氣、委婉）
Will you tell her that I'll be back in twenty minutes？
請(qǐng)告訴她我二十分鐘后回來，好嗎？
If you want help， just let me know ， will you？
你需要幫助就告訴我，好嗎？
Won't you come in and have a little whisky？
你要不要進(jìn)來喝一點(diǎn)兒威士忌？（或是：你進(jìn)來喝一點(diǎn)兒威士忌，好嗎？）
Would you tell me how to get to the shopping center？
您能告訴我怎么去購物中心嗎？
（2）用于表示愿望
Go where you will.去你想去的地方吧。
I will pay you at the rate you ask .我會(huì)按你要的利率付給你錢的。
He wouldn't let the doctor take his blood pressure.他不愿意讓大夫給他量血壓。
They had to obey whether they would or not.他們不得不遵從他們的意愿。
You shouldn't come to such a decision hastily.
你不應(yīng)該匆匆忙忙地作出這么一個(gè)決定。
You should write to your parents at least once a month.
你應(yīng)該至少每月給你父母親寫一封信。
We should read English aloud every morning.
我們應(yīng)該每天早晨朗讀英文。
They should do it for their own good.
為了他們自己利益他們應(yīng)該做這件事。
（2）表示對(duì)某種情況的估計(jì)
She shouldn't be out in such an early morning.
她不會(huì)這么一大早就出去了吧。
The effect of the tax should be felt in higher prices.
人們可能會(huì)從各種上漲的物價(jià)中感覺到這種稅的影響的。
The event should lead them to a even worse economic crisis.這次事件可能會(huì)將他們引向更嚴(yán)重的經(jīng)濟(jì)危機(jī)。
This book should be published in two months at most.
這本書最多兩個(gè)月后就會(huì)出版的。
（3）表示驚訝、失望等情緒
I think it is dreadful that anyone should be so miserable.
我認(rèn)為，竟然每個(gè)人都如此傷心就太糟糕了。
Why should I pay him for nothing？ 我干嗎要無為地付給他錢？
It seems so unfair that this should happen to me.
這件事竟然發(fā)生在我身上似乎太不公平了。
It's strange that it should be so cold today.奇怪，今天怎么會(huì)這么冷。
（4）用于某些從句中表示虛擬語氣
The doctor insisted that the girl should be hospitalized.
大夫堅(jiān)持認(rèn)為那個(gè)女孩要住院治療。
If it had not been for the doctor's care the girl should not be speaking to you now.要不是由于大夫的精心照料，這個(gè)女孩現(xiàn)在就不能與你說話了。
She stood away so that he should enter the room first.
她讓到一邊，好讓他第一個(gè)進(jìn)入房間。
I'll write it down lest I should forget it 我將它記下以免遺忘。
Take an umbrella with you in case it should rain.
帶上雨傘，以防萬一下雨。
will ，would
（would可以看作是will的過去式，這兩個(gè)詞除了時(shí)態(tài)不相同外，在表達(dá)意思的許多方面是相近的。當(dāng)然will 和would又都有一些各自不同的獨(dú)特用法。）
（1）用于第二人稱疑問句，表示請(qǐng)求（在這種用法中would使語氣更為客氣、委婉）
Will you tell her that I'll be back in twenty minutes？
請(qǐng)告訴她我二十分鐘后回來，好嗎？
If you want help， just let me know ， will you？
你需要幫助就告訴我，好嗎？
Won't you come in and have a little whisky？
你要不要進(jìn)來喝一點(diǎn)兒威士忌？（或是：你進(jìn)來喝一點(diǎn)兒威士忌，好嗎？）
Would you tell me how to get to the shopping center？
您能告訴我怎么去購物中心嗎？
（2）用于表示愿望
Go where you will.去你想去的地方吧。
I will pay you at the rate you ask .我會(huì)按你要的利率付給你錢的。
He wouldn't let the doctor take his blood pressure.他不愿意讓大夫給他量血壓。
They had to obey whether they would or not.他們不得不遵從他們的意愿。