现在进行时
主要叙述正在发生的事情。
句末常出现now；句首常出现look, listen。
组成主语 be 动词ing形式
I am reading English.
They are swimming.
He is playing football.
否定句：在be后加not
I am not reading English.
They are not swimming.
He is not playing football.
疑问句：将be 放到第一位。
Are you reading English?
Yes, I am./ No, I am not.
Are they swimming?
Yes, they are. / No, they aren’t.
Is he playing football?
Yes, he is. / No, he isn’t.
动词变ing形式
1.在动词末尾加ing. 如：play- playing
2. 末尾有e，要去e加ing. 如：ride – riding
3. 末尾以辅音元音辅音结尾，双写末尾的辅音字母.如：swim-swimming
一般过去时
主要描述过去发生的事情。
句末常出现last night/week/Monday/year, yesterday, ago
组成主语 动词过去式
I was a pilot.
They were busy.
He went to the market.
否定句：在be后加not，在普通动词前加didn’t 动词恢复原形。
I was not a pilot.
They were not busy.
He didn’t go to the market.
疑问句：提前be 动词或在句前加did
Were you a pilot?
Yes, I was./ No, I wasn’t.
Were they busy?
Yes, they were./ No, they weren’t.
Did they go to the market?
Yes, they did. / No, they didn’t.
动词变过去式
1. 在末尾加ed或d 如：play-played、like-liked
2. 辅音加y，结尾去y加ied.如：study-studied
3. 辅音元音辅音结尾双写最后一个字母加ed.如：stop-stopped
