1、定義：表示經常發(fā)生或習慣性的動作、狀態(tài)。句中通常有usually，often，every day，sometimes，always，at weekends，on Sundays等表示經常性時間的短語。
2、構成：
1)當謂語是be動詞時，一般現在時的構成：主語+be動詞+其他
如：I am a student. He is Jim’s father. They are from Japan.
2)當謂語是行為動詞時，一般現在時的構成：
①主語(非第三人稱單數)+動詞原形+其他
如：I often watch TV at the weekends.
Mr Green and Mrs Green like collecting stamps.
②主語(第三人稱單數)+動詞的第三人稱單數形式+其他
如：Jim usually visits his grandparents on Sundays.
She sometimes goes to the park with her mother.
3、動詞三單形式的變化規(guī)則：
① 一般情況下，直接加s 如：read-reads，swim-swims
② 以s，x，sh，ch，o結尾，加es 如：wash-washes，watch-watches，do-does
③ 以輔音字母+y結尾，變y為i，再加es 如：study-studies，fly-flies
④ 不規(guī)則變化 如：have-has
4、一般現在時的句型轉換：
肯定句 否定句 一般疑問句及回答
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.