牛津Should用法（字典原文1613）1. Used to show what is right, appropriate, etc., especially when criticizing sb‟s actions（常用于纠正别人）应该，应当：Y ou shouldn‟t drink and drive.你不应该酒后驾车。
He should have been more careful.他应当更小心一点才是。
ed for giving or asking for advice (提出征询或建议)该，可以。
You should stop worrying about it.你不应该再担心那件事了。
Should I call him and apologize?我是不是应该打电话向他道歉？I should wait a little longer, if I were you.假如我是你的话，我就再等会。
（ironic）”she doesn‟t think she will get a job.”“She should worry, with all her qualifications. “她担心找不到工作。
”她那么好条件，可真该担心的（反语）。
3. Used to say that you expect sth. is true or will happen (表示预期，可能)。
We should arrive before dark.我们天黑之前应该能赶到。
I should have finished the book by Friday.到星期五我应该能读完那本书。
The road should be less crowded today. 今天路应该不那么挤了把。
ed to say that sth that was expected has not happened (与预期相反)本应，本当。
It should be snowing now, according to the weather forecast.按天气预报，现在应该下雪才是。
The bus should have arrived 10 minutes ago.公共汽车十分钟以前就该到了。
5. （BrE formal）I or we instead of would for describing what you would do if sth else happened first.与I 或we连用代替would，表示虚拟结果；就将。
If I was asked to work on Sundays, I should resign.要是叫我星期天加班，我就不干了。
6. (Formal) used to refer to a possible event or situation. (表示可能)假如，万一。
If you should change your mind, do let me know.假如你改变主意的话，一定让我知道。
In case you should need any help, here‟s my number.万一你需要帮助的话，这是我的电话号码。
Should anyone call (=if anyone calls), please tell him I‟m busy.如果有人打电话来，请告诉他我正忙着。
7. used as the past form of shall when reporting what sb has said.在间接引语中用作shall的过去式。
He asked me what he should come.他问我应该什么时候来。
（BrE formal）I said (that) I should be glad to help.我说我乐意帮忙。
8.（BrE）used after that when sth is suggested or arranged.(用于that引导的，表示建议或安排的从句中). She recommended that I should take some time off.他建议我应该休息一段时间。
In order that training should be effective it must be planed systematically.为了培训有成效，必须有系统性的计划。
（should可以省略）9. Used after that after many adjective words that describe feelings. (用于许多表示感情的形容词后的that从句中)。
I‟m anxious that we should allow plenty of time.我殷切希望我们能流出充裕的时间。
I found it astonishing that he should be so rude to you.他竟然对你这样无礼，真叫我吃惊。
10. （BrE formal）used with we and I in polite requests.(与I和we连用，表示客气的请求) I should like to call my lawyer. 我希望给我的律师打个电话。
We should be grateful for you help.对您的帮助我会非常感激。
11. used with I and we to give opinions that you are not certain about.(与I和we连用，表示没有把握)I should imagine it will take about 3 hours.我想得用差不多三个小时吧。
Is this enough food for everyone? I should think so.食物够所有人吃吗？我想够了。
“Will it matter?”“I shouldn‟t think so.”这有关系吗？不会吧。
ed to express strong agreement(表示十分赞同)。
“I know it‟s expensive but it will last for years.”“I should think so too!”我知道价钱贵，但他可以用好多年。
我也是这么想的！“Nobody will oppose it.”“I should think not!”谁也不会反对，我想也是！13. why, how who what~sb/sth do. Used to refuse sth or to show that you are annoyed at a request; used to express surprise about an event or a situation. (表示愤怒、拒绝或惊讶)。
Why should I help him？he‟s never done anything to me.我为什么要帮他？他从没为我做过什么。
How should I know where you have left your bag? 我怎么知道你把包放在哪了？14. Used to tell sb that sth would amuse or surprise them if they saw or experienced it. (表示假如对方看见或经历某事物，一定会感兴趣或吃惊)真该，真应当。
You should have seen her face when she found out! 你真该看看他发现事情真相时的表情！语法说明一：Should/ought/had betterShould and ought to are both used to say that something is the best thing or the right thing to do, but should is much more common. Should和ought to均用以表示应该做某事，但should用的更多。
You should take the baby to the doctor‟s.你应该把婴儿带过去看医生。
I ought to give up smoking.我应该戒烟。
In questions, should is usuallyused instead of ought to.在疑问句中，通常用should而不用ought to。
Should we call the doctor?Had better can also be used to say what is the best thing to do in a situation that is happening now. had better 亦可表示在目前状况下最好做某事。
We‟d better hurry or we will miss the train.You form the past by using should have or ought to have. 过去时由should have或ought to have构成。
She should have asked for help.她本应请求帮助的。
You ought to have been more careful.你本应该更小心一点的。
The forms should not or shouldn‟t (and ought not to or oughtn‟t to, which are rare in AmE and BrE )are used to say that something is a bad idea or the wrong thing to do) should not或shouldn‟t（以及在美国英语很少见，英国英语中为正式用法的ought not to或oughtn‟t to）表示不应该。
You shouldn‟t drive so fast.你不应该把车开得那么快。
The forms should not have or shouldn‟t have and, much less frequently, ought not to have or oughtn‟t to have are used to talk about the past. Should not have或shouldn‟t have以及较少用的ought not to have 或oughtn‟t to have 均指过去。