Ответ:1.He is reading
2.They are playing
3.She is cleaning
4.I am swimming
5.Tom is speaking
6.You are waiting
7.Jack and Mary are doing
8.It is snowing
9.Mary and her friend are riding
10.My friend is explaining
Отрицание
1.They aren’t playing
2.He isn’t reading
3.She isn’t cleaning
4.I am not swimming
5.Tom isn’t speaking
Вопросительные
1.Are you waiting?
2. Are Jack and Mary doing?
3. Is it snowing?
4.Are Mary and her friend riding ?
5.Is my friend explaining?
Объяснение: