动词第三人称单数的变化规则及练习一、变化规则 1、直接在动词后+s 例如： like- likes play—plays 2、以 s， x, sh， ch， 接尾的动词:+es 例如： wash-washes3、以辅音+o 接尾的动词:+es 例如: go—goes4、以辅音+y 接尾的动词：变 y 为 i+es 例如: fly—flies动词短语：+s: Plays， skips, sings， gives， starts, likes， buys some toys， gets up comes back home makes noodles, eats lunch drinks coffee begins his class ， practices the piano+es ： watches TV brushes his teeth goes to bed goes to school does my homework does some readingy→ i+ es: fly → flies study →studies 注意：不规则变化:have—--—-has，be—--—---is，do---—-does写出下列动词的第三人称单数 drink ________ go _______ stay ________ make ________look_________ have_______ pass_______ carry _____come________ watch______ plant_______ fly ________study_______brush________ do_________ teach_______practice________二、请看下面两组句子，注意区分他们的共同点和不同点。I go to school every day. I don’t go to school every day。He goes to school every day. He doesn't go to school every day。Do you go to school every day? Yes， I do。 （No, I don't） Does he go to school every day?Yes, he does。 (No, he doesn't）注：1）第三人称单数用了 does 后面就不用动词 的 s 形式了 , 而用动词原形 . 。 2)变为疑问句 , 要在句首加 " D o , D oes ; 变为 否定句 , 要在动词前面加” do not ， does not”, 可以简写为 "don’t, doesn’t. 课堂练习一一、把下列句子改成一般疑问句并做肯定否定回答。1．I usually get up at six o'clock.Do you usually get up at six ？Yes, I do . /No, I don’t 。2. We usually write e—mails on Saturday evening ？ Yes, No， 3。 They have the same hobby。 ？ Yes, No， 4。 Su Hai and Su yang like listening to music after school. ? Yes， No， 5 。 Helen usually watches TV in the evening。 ？ Yes， No, ...
