Задать общий вопрос и дать краткий ответ.
1.He is a good swimmer. ...........?Yes,........

2.He can swim. .............?Yes,.......
3.He is swimming. .............?Yes, ......
4.He swims in the river. ....... ?Yes,....
5.There is a river there ....... ?Yes, ......
6.its a river ........?Yes, .......
7.The men are carrying large boxes. .........?Yes, .......
8.The boxes are large. .........?Yes, ......
9.There are boxes in the room? ....... Yes, ......
10.There boxes are in the room?...... Yes,......