小学英语语法:一般现在时
1、定义:表示经常发生或习惯性的动作、状态。句中通常有usually,often,every day,sometimes,always,at weekends,on Sundays等表示经常性时间的短语。
2、构成
当谓语是be动词时,一般现在时的构成:主语+be动词+其他
如:I am a student. He is Jim‟s father. They are from Japan.
当谓语是行为动词时,一般现在时的构成
①主语(非第三人称单数)+动词原形+其他
如:I often watch TV at the weekends.
Mr Green and Mrs Green like collecting stamps.
②主语(第三人称单数)+动词的第三人称单数形式+其他
如:Jim usually visits his grandparents on Sundays.
She sometimes goes to the park with her mother.
3、动词三单形式的变化规则
① 一般情况下,直接加s 如:read-reads,swim-swims
② 以s,x,sh,ch,o结尾,加es 如:wash-washes,watch-watches,do-does
③ 以辅音字母+y结尾,变y为i,再加es 如:study-studies,fly-flies
④ 不规则变化 如:have-has
4、一般现在时的句型转换
肯定句 | 否定句 | 一般疑问句及回答 |
They watch TV every day. |
They don’t watch TV every day. |
—Do they watch TV every day? —Yes, they do. / No, they don’t. |
She watches TV every day. |
She doesn’t watch TV every day. |
— Does she watch TV every day? —Yes, she does. / No, she doesn’t. |
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