上海牛津小学英语语法知识总结一般现在时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:1)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
2)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 d