初一英语知识点：时态

　　三、时态

　　1、一般现在时　表示普遍、经常性的或长期性的动作时使用一般现在时，它有：

　　Be 动词：She’s a worker. Is she aworker? She isn’t a worker.

　　情态动词：Ican play the piano. Can you play the piano? I can’tplay the piano.

　　行为动词：Theywant to eat some tomatoes. Do they want to eat any tomatoes? They don’t want to eat any tomatoes.

　　Gina has a nicewatch. Does Gina have a nice watch? Gina doesn’t have a watch.

　　2、现在进行时　　表示动词在此时正在发生或进行就使用进行时态，结构为sb be v-ing sth + 其它.

　　I’m playing baseball. Are you playing baseball? I’m not playing baseball.

　　Nancyis writing a letter. Is Nancywriting a letter? Nancy isn’t writing aletter.

　　They’re listening to the pop music. Are they listening the pop music?They aren’t listening to the pop music.