1. They often play cards. A) Change the tense of the following: B) SUBJECT : Tenses (Rewrite or Combine) 1. They often play cards.

Решение:

Задание требует изменить время глагола "play" в предложении "They often play cards" согласно указанным вариантам.

1. a) When I saw them, they were playing cards. (Past Continuous: действие происходило в прошлом в течение какого-то времени.)
2. b) for two hours. They have been playing cards for two hours. (Present Perfect Continuous: действие началось в прошлом и продолжается до сих пор.)
3. While we were studying maths, They played cards. (Past Simple: действие произошло в прошлом, во время другого действия.)
4. d) three hours ago. They played cards three hours ago. (Past Simple: действие произошло в конкретное время в прошлом.)
5. e) on Saturday nights. They play cards on Saturday nights. (Present Simple: регулярное действие, привычка.)
6. f) at the moment. They are playing cards at the moment. (Present Continuous: действие происходит прямо сейчас.)

Ответ: a) were playing, b) have been playing, c) played, d) played, e) play, f) are playing.