| 标题 | 小学英语语法大全12一般现在时 |
| 内容 | 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. |
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