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來源：網絡資源 2023-08-16 11:20:07
1
---肯定句
基本結構：主語+ am/is/are + 現在分詞 + ……
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
基本結構：主語+ am/is/are + not +現在分詞+ ……
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
---一般疑問句
基本結構：Am/Is/Are + 主語 +現在分詞 + …… ?
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
---特殊疑問句
基本結構：疑問詞+ am/is/are + 主語 +現在分詞 + …… ?
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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