B. Make the following negative. 1. Our professor has come from London (yet) 2. I have written a letter to Ann. 3.
They have opened the shop. 4. My friend has changed since I saw him last. 5. He
has told the director about it. 6. She has spoken at the meeting today. 7. I have done
my homework. 8. We have met them (since 2010). 9. I have studied this subject

(never).

1. Our professor has not come from London yet. 2. I have not written a letter to Ann. 3.

They have not opened the shop. 4. My friend has not changed since I saw him last. 5. He

has not told the director about it. 6. She has not spoken at the meeting today. 7. I have not done

my homework. 8. We have not met them since 2010. 9. I have never studied this subject .

Объяснение: