I ______(am writing) an English exercise now. I _______(was writing) an English exercise at this time yesterday.
My little sister _______(is sleeping) now. My little sister ________(was sleeping) at this time yesterday.
My friends _______(are not doing) their homework now. They _______(are playing) volleyball.
My friends ______(were not doing) their homework at seven o’clock yesterday. They ______(were playing) volleyball.
What __are___you ______( doing) now? — I _______(am drinking) tea. ___Were___you ______( drinking) tea at this time yesterday? — No, I ________(was not drinking) tea at this time yesterday, I ________(was eating) a banana.