英语,一些 is ,am ,are ,还有许多这种词汇是什么意思?

1个回答

  • is,am,are这些都是BE动词,是谓语,它们通常在句子中承担起指示、肯定或者确定某样事务的功能.

    is用在第三人称单数上,如He is a handsome boy./She is very pretty.

    is的否定形式是is not,即isn't.

    过去式是was.

    am只用在“我”身上.如I am a student from Yucai Middle School.

    am的否定形式是aren't.(这个比较特别)

    过去式是were.

    are用在第三人称复数上,如They are all Americans.

    are的否定形式是aren't.

    过去式是were.