句型转换根据括号中的句子把整个句子改为否定句疑问句并作肯定回答和否定回答IhavebeenlearningEnglish(for5years.)Theyhavebeendancing(forhalfanhour.)Wehavebeenskating(since9o'clock.)Hehasbeenpaly

Question

句型转换
根据括号中的句子把整个句子改为否定句 疑问句 并作肯定回答和否定回答
I have been learning English (for 5 years.)
They have been dancing (for half an hour.)
We have been skating (since 9 o'clock.)
He has been palying computer (since he has 9 years old.)

Answer 1

1. I haven't been learning English for 5 years.
Have you been learning English for 5 years?
Yes, I have. / No, I haven't.
2. They haven't been dancing for half an hour.
Have they been dancing for half an hour?
Yes, they have. / No, they haven't.
3. We haven't been skating since 9 o'clock.
Have you been skating since 9 o'clock?
Yes, I have. / No, I haven't.
4. He hasn't been playing computer since he was 9 years old.
Has he been playing computer since he was 9 years old?
Yes, he has. / No, he hasn't.