1.
I wasn’t able to remember the password.
Can you use this machine?
If you work out every day,you will be able to lose some weight.
I can’t pay the fee.
I played a game of chess with my uncle but I couldn’t beat him

2.
It may rain this afternoon.
He might buy a TV.
She could send an e-mail.
He might order soup.
They may get into the final

3.
I belive it is really important,because exercise makes you stronger and healthier.
In my view not at all,because it is easier to write longer texts with them.
In my oppinion this statement is not true,because classical music is relaxing and makes you calm.

4.
They must know where she is.
She can’t be unfit.
They must remember him.
she can’t be home.
He must be a fast runner.