Question

1) write sentices in the contractive, negative and interrogative form.

a)they are good studentes


b)we are very friends


c)she is a bad play-soccer


d)he is a singer


e)Toby is a engineea

Answer 1

a)They aren´t good students. 
Are they good students?
b)We aren't good friends.
Are we good friends?
c)She isn't a bad play-soccer.
Is she a bad play-soccer?
d)He isn't a singer.
Is he a singer?
e)Toby isn't a engineer.
Is Toby a engineer?

Answer 2

a) They are good students.
I - Contractive Form
They're good students.
II - Interrogative Form
Are they good students?
III - Negative Form
They aren't good students. / They're not good students. / They are not good students.

b) We are very friends.
I - Contractive Form
We're very friends.
II - Interrogative Form
Are we very friends?
III - Negative Form
We aren't very friends. / We're not very friends. / We are not very friends.

c) She is a bad soccer player.
I - Contractive Form
She's a bad soccer player.
II - Interrogative Form
Is she a bad soccer player?
III - Negative Form
She isn't a bad soccer player. / She's not a bad soccer player. / She is not a bad soccer player.

d) He is a singer.
I - Contractive Form
He's a singer.
II - Interrogative Form
Is he a singer?
III - Negative Form
He isn't a singer. / He's not a singer. / He is not a singer.

d) Toby is a engineer.
I - Contractive Form
Toby's a engineer.
II - Interrogative Form
Is Toby a enginner?
III - Negative Form
Tobby isn't a engineer. / Tobby is not a singer.