3. will与would的用法

情态

动词 用法 例句

will

与

would 用于表示意志或意愿。Will指现在，would指过去 I will never do that again.

They said that they would help us. 表示请求、建议等，用would比用 will委婉、客气些 Will you please take a message for me?

Would you please pass him the book? 表示习惯性动作，译为"总是""惯于"。Will指现在，would指过去 Fish will die without water.

Every evening, she would sit by the window, deep in thought. 表示预料或猜想 It would be about ten when he left home.

I thought he would have told you about that. 用于否定句中，表示"不肯""不乐意" No matter what I said, he wouldn't listen to me. 4.shall与should的用法

情态

动词 用法 例句

shall 用于第一、第三人称疑问句中，表示说话人征求对方的意见 What shall we do next?

Shall I do the washing-up?

When shall my brother be able to leave hospital? 用于第二、第三人称的陈述句中，表示说话人给对方的命令、警告、允诺或威胁 You shall go with me. ( 命令)

You shall have a new dress for your birthday.（允诺）

He shall be punished.（威胁）

should 表示劝告或建议，作"应该"讲 We should be strict with ourselves.

You should keep your promise. 表示推测，作"可能"、"该"讲 The roads should be less crowded today.

I should have finished reading it by Friday. Why / how + should结构表示说话人对谋事不能理解、感到惊异等意思，译为"竟会" Why should you be so late today?

（你今天怎么来的这么晚？）

I don't know why you should think that I did it.

（我真不明白你凭什么认为这件事是我干的。）