Exercise 2. Сделайте предложения отрицательными
1. You have been writing a report since morning.
2. We have been working in the garden for three hours.
3. I have been typing letters since ten o’clock.
4. Tom has been running for twenty minutes.
5. A cat has been sitting in the tree for an hour.
6. Jane has been studying English for two years.
You haven't beenwriting a report since morning.
We haven't been working
I haven't been typing
Tom hasn't been running
A cat hasn't been sitting
Jane hasn't been studying
1.have not been
2.haven't been
3.haven't been
4.have not been
5.hasn't been
6.hasn't been
элементарно!