Unit 5 (The dolphins are jumping)
Pupil’s book page 21 ex 2 (Look and answer)
The present continuous
The present continuous tense indicates that an action which is happening now,. The Present Continuous Formula: to be [am, is, are] + verb [present participle]
I (am+v.ing)
He,She,it (is+v.ing)
You, we, they (are +v.ing)
Examples 
I am reading books.
I am not reading books.
They are playing football now.
They aren't playing football now.
She is drinking milk
She isn't drinking milk
Is he visiting the library?
Yes, he is/No, he isn't.
Are they watching TV?
Yes, they are/ No, they aren't
Are you listening to music?
Yes, I am / No, I'm not.