现在进行时

　　表示正在发生的事情或进行的动作，常与now,listen,look等词连用，结构是主语+be动词(am, is, are)+动词ing.

　　如：It is raining now.

　　外面正在下雨

　　It is six o’clock now.

　　现在6点了

　　My parents are reading newspapers in the sitting room.

　　我父母正在客厅看报纸

　　Look! The children are having a running race now.

　　看!孩子们正在赛跑

　　问句将be动词移前，否定句在be动词后+not.

　　一般现在时

　　表示经常反复发生的事情或动作，常与often, usually, sometimes, always, every day(week year…) on Sundays等词连用。

　　结构是主语+动词原形;当主语为第三人称单数即he,she, it, Tom, my mother, the boy等词时，动词后加s或es.

　　如：We have an English lesson every day.

　　我们每天都要上英语课

　　Do the boys run faster than the girls? Yes, they do.

　　男孩比女孩跑的快吗?是的

　　问句借助于do, does否定句借助于don’t, doesn’t，后面动词一定要还原。

　　一般过去时

　　表示发生在过去的事情或存在的状态，常与just now; a moment ago; … ago; yesterday; last ( week; month; year; Monday; weekend); this morning等词连用。

　　结构是主语+be动词的过去式(was; were)或主语+动词的过去式。

　　注意：be动词与动词过去式不可同时使用。

　　如：My earphones were on the ground just now.

　　我的耳机刚刚还在呢。

　　Where were you last week? I was at a camp.

　　你上个星期去哪了?我去野营了

　　What did you do yesterday? I visited a farm

　　你昨天去干嘛了?我去参观农场了。

　　问句有be动词将be动词移前，没有be动词借助于did，后面动词还原;

　　否定句有be动词在后面加not，没有借助于didn't后面动词还原。