来源:网络资源 2023-08-16 11:20:07
1
---肯定句
基本结构:主语+ am/is/are + 现在分词 + ……
I am watching TV now.
I am speaking with him on the phone.
They are travelling in Europe now.
Look! He is riding a roller coaster.
2
---否定句
基本结构:主语+ am/is/are + not +现在分词+ ……
I am not studying
She isn’t playing the guitar.
Joe isn’t running in the park.
We aren’t enjoying our trip.
They are not playing football.
3
---一般疑问句
基本结构:Am/Is/Are + 主语 +现在分词 + …… ?
Are they playing tennis now?
Yes, they are. / No, they aren’t.
Is she still studying abroad?
Yes, she is. / No, she isn’t.
Look! Is a bird flying in the sky?
Yes, it is. / No, it isn’t.
4
---特殊疑问句
基本结构:疑问词+ am/is/are + 主语 +现在分词 + …… ?
What are you reading now?
What are you doing now?
I’m observing the structure of the plane.
What course are you taking at weekends?
I’m taking an English course.
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