1、定義：表示經(jīng)常發(fā)生或習(xí)慣性的動(dòng)作、狀態(tài)。句中通常有usually，often，every day，sometimes，always，at weekends，on Sundays等表示經(jīng)常性時(shí)間的短語(yǔ)。

2、構(gòu)成：

1)當(dāng)謂語(yǔ)是be動(dòng)詞時(shí)，一般現(xiàn)在時(shí)的構(gòu)成：主語(yǔ)+be動(dòng)詞+其他

如：I am a student. He is Jim’s father. They are from Japan.

2)當(dāng)謂語(yǔ)是行為動(dòng)詞時(shí)，一般現(xiàn)在時(shí)的構(gòu)成：

①主語(yǔ)(非第三人稱單數(shù))+動(dòng)詞原形+其他

如：I often watch TV at the weekends.

Mr Green and Mrs Green like collecting stamps.

②主語(yǔ)(第三人稱單數(shù))+動(dòng)詞的第三人稱單數(shù)形式+其他

如：Jim usually visits his grandparents on Sundays.

She sometimes goes to the park with her mother.

3、動(dòng)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(jié)尾，加es 如：wash-washes，watch-watches，do-does

③ 以輔音字母+y結(jié)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(xiàn)在時(shí)的句型轉(zhuǎn)換：

肯定句 否定句 一般疑問(wèn)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.