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简介:
主要描述经常会发生的动作、状态或不变的真理。
句末常出现every day/week/year/Monday , in the morning;句中常有always, usually, often, sometimes
组成 1.主语+be+名词(形容词)
I am a student.
He is tall.
否定句:在be 后加not
I am not a student.
He is not tall.
疑问句:be 动词提前到第一位。
Are you a student?
Yes,I am./No,I am not.
Is he tall?
Yes,he is./No,he isn’t.