小学英语语法：小学英语必须掌握的四大时态
2019-03-04 09:13
来源：小学英语
作者：
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
