Поставьте глаголы в отрицателньой форме:
1)my friend has been reading for 2 hours alredy
2)they work as doctors
3)the hours has taken the blood presure
1)my friend has not (hasn't) been reading for 2 hours already
2)they do not (don't) work as doctors
3)the hours has not (hasn't) taken the blood presure
My friend has not been reading.....
They do not work as...
The hours has not taken ...