1. Minh is learning English in the classroom now.
(-)Minh isn't learning English in the classroom now
(?) Is Minh learning English in the classroom now ?
2. They are watching TV at the moment.
(-) They aren't watching TV at the moment.
(?) Are they watching TV at the moment ?
3. Mrs Chung is teaching English at Yendung high school No3 at present.
(-) Mrs Chung isn't teaching English at Yendung high school No3 at present.
(?) Is Mrs Chung teaching English at Yendung high school No3 at present ?
4. Lan and Hoa are practising speaking Chinese.
(-) Lan and Hoa aren't practising speaking Chinese.
(?) Are Lan and Hoa practising speaking Chinese ?
5. Mr John is listening to Pop music in the sitting – room.
(-) Mr John isn't listening to Pop music in the sitting – room.
(?) Is Mr John listening to Pop music in the sitting – room ?