Умова завдання:

Complete the statements using the correct form of 'to be' and the verb. Use the long (full) forms.
Example: They _______________ in the lake. (to swim)
Correct: They are swimming in the lake.
Incorrect: They're swimming in the lake.
1. They  a computer game. (to play)
2. She  a song. (to sing)
3. John  his mother. (to help)