entirety一般现在时中be动词的使用

2021年1月8日发(作者：祝新)
一般现在时中be动词的使用
一．be动词：
动词be (am, is, are)说明身份、年龄、状态等
I am a teacher.
I am 21 years old.
I’m very healthy.
二、be动词的人称变化：
第一人称I，后面的动词用am;
第三人称he/she/it, 后面的动词用is;
第一人称复数we, 第二人称you, 第三人称复数they，后面的动词用are.
三、be 动词在一般疑问句和否定句中的表达：
--- Are you the student from Class Two?
--- No, I’m not.
--- Is he Canadian?
--- No, he isn’t.
--- Are they fond of pop music?
--- No, they aren’t.
从上面例句中可看出， 动词be一般现在时的一般疑问句中把be提到句首，
它的否定句式是在be后直接加not。
四、be 动词的具体使用：
1．be + 形容词
I’m very tired.
He is handsome and smart.
The vegetables are fresh.
It’s hot today.
The traffic is always heavy.
The book is interesting.
My trip to Paris is exciting.
Their opinion is different from mine.
She is kind enough to help me out.
My room is rather small.
The stories in the book are scary.
Sue and Sam are friendly to me.
2. be + 名词
They are my close friends.
She is a nice girl.
They are baseball players.
That’s a good idea.
Moscow is a busy city.
They aren’t my notebooks.
I am a patient teacher.
Cindy is a housewife.
Jake is an engineer.