一般现在时讲解与练习 1 一般现在时态 一、一般现在时的用法 1) 表示经常性、习惯性的动作或存在的状态。通常与副词sometimes, often, usually, always, every day (year, month ), once (twice, three times) a day, 等等频率副词（时间状语）连用。 e.g. They usually go to school by bike. I take the medicine three times a day. 实义动词表示“动作” She helps her mother once a week. Mary’s father is a policeman. There are 50 students in my class. Be 动词表示“状态” He is very busy now. be 、do 不能放一起，如果非要放一起，do 后要加 ing, 变成现在进行时。 2) 表示主语的特征、性格、爱好等。 e.g. I work hard. I like watching TV. 3) 表示客观真理 e.g. There are seven days in a week. The moon moves round the earth. The sun rises in the east and sets in the west every day. Tomorrow is Tuesday. 二、一般现在时的句子转换： 三、一般现在时的结构：“主语+谓语+其它” ，有时为了起强调作用，时间状语也可提前 . 三单变化： 1）多数在动词后＋s ： play — plays like — likes ask---asks work---works get---gets stay---stays 2）以字母 s, x, ch, sh 或o 结尾的动词，+-es： watch---watches wish---wishes fix---fixes do---does go---goes pass---passes 3）以“辅音字母加 - y” 结尾的动词，要先变 y为 i+-es. try---tries study---studies cry---cries fly---flies 肯定句 否定句 一般疑问句及回答 They watch TV at six everyday. They don’t watch TV at six everyday. ---Do they watch TV at six everyday. ---Yes, they do. / No, they don’t. She watches TV at six everyday. She doesn’t watch TV at six everyday. ---Does she watch TV at six everyday. ---Yes, she does. / No, she doesn’t. he/tommy is English. We/dan and mark are here. he/tommy isn’t English. We/dan and mark aren ’t here. Is he/tommy English? Are We/dan and mark here? 一般现在时讲解与练习 2 不规则变化：be---- is are have----has 做...
