Twinky isn't riding his fly-bike.
The children aren't playing volleyball.
Twinky isn't playing starball.
You are writing sentences now.
Are her parents listening to music now?
The girl isn't doing her homework now.
Давай тебе объясню про окончание ing
Утвердительные предложения
1. You he she it
2. Are(you we they)
Is(she he it
Am(I)
3. глагол с ing
4.И другое
Отрицатильные предложение
Всё также только к to be прибавляем n't
Вопрос
1 Are is am
2. You she l
3. глагол с ing
4. и другое
Надеюсь тебе помогла)