<span>1-my brother and I have been cleaning my room since 2 o'clock
2-we had already been cleaning our room for an hour when mum came home.
3-she said they had been building that house all that year
4-Have they been building their house all this summer?
5-how long has your brother been working as an engineer?</span>
Many centuries ago the Tower of London was a fortress,a prison, an armory, a Royal Mint and an observatory. In medieval times the Tower had been used for storing Crown Jewels of the UK. The most famous victims of the Tower were:Ann Boleyn, Thomas Moore, Queen Elizabeth l. If the ravens ever leave the Tower, the British Monarchy will be doomed. The Tower was also used as a Zoo.
It all depends on the person.
1. Do;
2. Does;
3. Do;
4. Do;
5. Does;
6. Do;
7. Does;
8. Do;
9. Does;
10. Does.
<span>Having cooked the meat pie, mother
found it too salty.
Having looked into the fridge, Mike found out that he had nothing to eat.
I heard them singing in the next room.
Having fed her family, she ate dinner herself.
Having entered the room, she found nobody in.
The man standing by the window is our dean.
Having cut his finger, he went to see a doctor.
(When) doing the test, he couldn't remember the forms of the verbs.
Having done the test, she decided to have a short rest.</span>