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 TVevery day. They don’t watch TVevery day. —Do they watch TV every day?—Yes, they do. / No, they don’t.
She watches TVevery day. She doesn’t watchTV every day. — Does she watch TV every day?—Yes, she does. / No, she doesn’t.