# 一般现在时 表示通常性、规律性、习惯性、一般性的状态或者动作。 主语是单数第三人称时，动词有单三的变化；主语是非第三人称单数时，动词为原型。 ``` They often get up at 7:00. He often gets up at 7:00. ``` > 动词单三的变化： > * 结尾直接加 s > play-plays > * 以s、o、x、ch结尾的动词加 es > guess-guesses > * 以辅音字母 + y结尾的动词，变y为i，再加 es > study-studies > 一般现在时的否定和疑问句 > 使用do、does帮助构成 > does 用在单三之后 ``` He doesn't like the car. ``` ``` Does he like the car? ``` ``` -Yes,he does./No,he doesn't. ``` # 现在进行时 表示现在正在进行或发生的动作 居中通常有now等时间副词呼应 基本结构：`be + doing(动词的现在分词)` be动词需要有单复数和时态的变化 ``` They are watching TV. He is watching TV. I am watching TV. ``` > 动词现在分词的变化： > * 结尾直接加 ing > work-working > * 动词以不发音的 e结尾，要去e加ing > take-taking > * 重读闭音节的动词，要双写词尾字母，再加ing > cut-cutting > * 以ie结尾的动词，变ie为y再加ing > lie-lying > 现在进行时的否定和疑问句 > 将be动词否定或提前 ``` They aren't watching TV. ``` ``` Are they watching TV? ``` ``` He isn't watching TV. ``` ``` Is he watching TV? ``` ``` Am I watching TV? ``` ``` Yes,you are./No,you aren't. ```