在寧波小升初英語復(fù)習(xí)的過程中，知識(shí)點(diǎn)有很多，包含著語法、時(shí)態(tài)等等。下面是寧波奧數(shù)網(wǎng)小編整理的小升初英語情態(tài)動(dòng)詞用法及詳細(xì)解析，大家可以看下。

　　情態(tài)動(dòng)詞只有情態(tài)意義，即它所表示的是說話人對(duì)動(dòng)作的觀點(diǎn)，如需要、可能、意愿或懷疑等。

　　情態(tài)動(dòng)詞的特征：

　　1.在形式上，情態(tài)動(dòng)詞沒有實(shí)義動(dòng)詞的各種變化。

　　2.在意義上，大多數(shù)情態(tài)動(dòng)詞有多個(gè)意義。

　　3.在用法上，情態(tài)動(dòng)詞與助動(dòng)詞一樣，須后接動(dòng)詞原形。

　　情態(tài)動(dòng)詞各自的基本意義及用法

　　一、can 與could用法對(duì)比表

　　對(duì)比點(diǎn) can could

　　1、表“能力” Can you lift this heavy box? I couldn’t understand what he said at all.

　　2、表“許可” You can use a different material instead. He said I could borrow his bike.

　　3、“懷疑” No, no, it can’t be true.

　　What on earth can this mean? We thought the story could not be true. How could you be so careless?

　　4、can與be able to 區(qū)別 1. could代替 can，表示語氣更為婉轉(zhuǎn)。

　　Eg. Could I use your bike? Yes, you can.

　　2. can (能夠)=be able to(僅表能力時(shí))，但be able to 表示一番努力后，才能做得到，且有更多的時(shí)態(tài)。

　　He was a good swimmer, so he __________ swim to the river bank when the boat sank.

　　A. could B. might C. shall D. was able to

　　二、may與 might用法對(duì)比表

　　對(duì)比點(diǎn) may Might

　　1.表“詢問” May I …?(=Can I …?) Might I …?(=Could I…?)(但比用may 更客氣)

　　2.表“允許” You may take the boy there. He told me he might come .(might 與told相呼應(yīng))

　　3.表“可能”“或許” She may nor like this place. I’m afraid he might not like this play.

　　注： 1. May I…?的答語。

　　2.may可表示期望或祝愿

　　May you succeed !

　　3.may (might)用于目的狀語從句中 肯定：Yes, you may.

　　否定：No, you mustn’t 不行(語氣強(qiáng)硬)

　　No, you may not 或No, you’d better not.

　　The emperor gave them some gold in order that they might begin their work at once.

　　三、must與have to的用法對(duì)比表

　　對(duì)比點(diǎn) must have to

　　1.表“必須” (主觀看法)必須;沒有過去式，可用于間接引語中。He told me I must do according to what he said. (客觀需要)不得不，有多種時(shí)態(tài)。It’s raining heavily, we can’t go now.

　　2.疑問句 Must I …?

　　Yes, you must.(一定)

　　No, you needn’t./ you don’t have to.(不必) Do you have to go today?

　　Yes, we do.

　　否定句：You don’t have to worry about that.

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