请问be动词的具体用法,比如就近一致原则,A AND B + be,A or B + be

2个回答

  • e作助动词用的形式如下:

    ①am,is,are,was,were

    ②助动词+be:shall be,will be,can be,etc.

    ③have/has/had + been(完成时)

    ④am,is,…being(进行时)

    (1)表达进行时态

    句型 be + V-ing…(进行时态)

    例:What are you reading?

    (你正在阅读什么?)

    I am reading a magazine.

    (我正在阅读杂志.)

    例:He will be taking a walk in the park at this time tomorrow morning.

    (明天早晨此时他将会正在公园散步.)

    例:She has been teaching English in our school for years.

    (她已在我们学校教英语许多年了.)

    解说 第一例句是表达现在进行时,第二例句是将来进行时,第三例句是现在完成进行时.

    (2)表达被动语态

    句型 be +p.p.…(被动语态)

    例:English is spoken in both Canada and the United States.

    (加拿大和美国都讲英语.)

    例:Those keys were found in your drawer.

    (那些钥匙是在你的抽屉里找到的.)

    例:It can be done much faster in this way.

    (这件工作用这个方法可以更加快速地做好.)