Ккаждому из этих предложений составить отрицание. не через переводчик. i start doing my homework. i started doing my homework. i will start doing my homework. she looks around. she looked around. she will look around. they agree to go for a walk with us. they agreed to go for a walk with us. they will agree to go for a walk with us.

I don't start doing my homework.
I didn't start doing my homework.
I won't start doing my homework.

She doesn't look around.
She didn't look around.
She won't look around.

The don't agree to go for a walk with us.
The didn't agree to go for a walk with us.
They won't agree to go for a walk with us.