Question

Uma frase negativa e uma afirmativa com do, does, did, will, can, should e must

Answer 1

I don't know what happened 
I do english course in mornings 

She doesn't know what happened.
She does her homework at weekends.

I didn't do it!
I did my homework.

I will make a test on saturday
I won't play soccer with my friends. :(

I can do that!
I can't stay here..

You should know: Your mother loves you.
You shouldn't make your bed.

You   must listen to  me!
You mustn't listen to her!

Answer 2

Afirmativa
She does samba lesson every day -> Ela faz aula de samba todo dia
 Negativa
Paul did not go to series. -> Paulo não passou de série.