一般现在时：主+be（am/is/are）+表
例句：I am a girl.
主+谓（动词原形/动词三单）（+宾）
例句：He goes to school by bus.
一般过去时：主+be（were/was）+表
例句：He was five years old last year.
主+谓（动词过去式）（+宾）
例句：My mother cleaned my room yesterday.
一般将来时：主+will+动词原形+表/（宾）
例句：It will rain tomorrow.
I will be there on time.
主+be going to +动词原形
例句：We are going to have a party on Sunday.
现在进行时：主+be（am/is/are） doing
例句：I am doing my homework now.
过去进行时：主+be（was/were) doing
例句：He was having a class at 10:00 yesterday.
现在完成时：主+have/has+动词过去分词
例句：He has been here for 5 years.
过去完成时：主+had+动词过去分词
例句：I had been a teacher since 1990.
过去将来时：主+would+动词原形
例句：It would be taken to my father by me.
主+be（was/were) going to+动词原形
例句：He was going to buy the book himself.
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