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行为动词一般现在时讲解.ppt

发布:2018-09-30约3.74千字共19页下载文档
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一、什么是行为动词 行为动词指除动词be和have以外,一切可以单独作谓语的动词。动词be和动词have一般表示状态,而行为动词大都用来表示动作,如work,study,swim等。 二、行为动词一般现在时的构成 行为动词一般现在时须用动词原形表示,但当主语是第三人称单数时,词尾须加-s或-es,其构成方法与名词复数构成方法相同,现以动词work为例: I You(你) He She It We You(你们) They 三、行为动词一般现在时的基本用法 1)表示现在经常发生或习惯性的动作或状态: I usually walk to school. They work here. My grandfather watches TV every evening. He goes to school by bus. 2)表示客观事实或普遍真理: The sun rises in the east. The earth moves round the sun. Two plus two makes four. 3)表示主语的特征、性格、能力等: She sings well. John and I love sports. We work hard. They all like me. 注意:英语中的人称代词有主格和宾格之分。主格人称代词在句中作主语;宾格人称代词作动词或介词宾语。一般现在时还常用在下列句子中: Here comes the bus. Here he comes. There goes the bell. 2)以s, x, sh, ch结尾的动词加-es: finish — finishes teach — teaches watch — watches guess — guesses fix — fixes mix — mixes 五、常与一般现在时搭配使用的时间状语 1)表示时间频度的词语: always usually often sometimes hardly never 2)与every一起用的状语词组: every 写出下列动词在句中的适当形式: 4)His father and mother like watching TV. 5)She does her homework in the evening. 6)The students do morning exercises every day. * * work. works. work. 四、行为动词一般现在时第三人称 单数形式的构成 行为动词一般现在时的第三人称单数形式的构成 方法和名词复数的构成方法完全一样。 1)一般在动词原形后加-s: work — works run — runs live — lives 4)如词末为-o,-o前为辅音字母,加- es: go — goes do — does 3)以辅音字母加y结尾的动词变y 为i 再加-es: carry — carries fly — flies 但play — plays的y 之前是元音字母,只加-s。 day week month spring year Monday every other day (=every two days) every three hours once every two months 3)其他 in the morning the afternoon the evening twice a week 要点6 一般现在时的否定式 一般现在时的否定式是在动词原形前加助动词do not (don’t );主语是第三人称单数时在动词原形前加助动词does not (doesn’t),其结构为: 1)主语 + don’t+ 动词原形 They don’t work here. I don’t go to school on Sundays. 2)主语(第三人称单数)+ doesn’t+ 动词原形 She doesn’t like sports. The boy doesn’t study hard. *如句中用了never(从不),hardly(很少、几乎不)等词来表示否定意义,就不能再使用助动词don’t 或doesn’t , 试比较: I don’t know you. I hardly know you. I don’t hardly know you. (F) 一般现在时用never , hardly 表示否定意义时,如主语为第三人称单数,行为动词要加-s 或-es。试比较: He never gets up early. He hardly gets up early. He
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