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 ， practises 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_______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 "do" does ; 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。 Suhai and Su yang like listening to music after school. ? Yes， No, 5. Helen usually watches TV in the evening. ？ Yes， No， 二、否定句：在动词前+doesn't...
