Esercizio di grammatica inglese on-line per studenti del livello elementare sul past continuous. Trova la forma corretta del verbo.
1) While I read / was reading, my mother was washing the dishes.
2) Tom played / was playing football yesterday.
3) She turned/ was turning off the lights and went / was going to bed.
4) Yesterday at 7 o'clock, we played / were playing tennis.
5) We waited / were waiting for Susan, when my father came round the corner.