Нужно переделать предложения в отрицательные и вопросительные .
Past Simpl Tense
1)Gymnastics (be) fun to do.
2)The teacher (may) open . The window in the lesson.
3)Students (can) wear trendy clothes.
4)I (be) in the country last summer.

1) Gymnastics was fun to do.Gymnastics wasn't fun to do.2) The teacher may open the window in the lesson.The teacher may not open thw windiw in the lesson.3) Students could wear trendy clothes.Students couldn't wear trendy clothes.4) I was in the country last summer.I wasn't in the country last summer.