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1.
Mike and Alison are  in the park. You  are  at college. The  engineer is at the factory now.

2.
large-large-the largest
short-shorter-the shortest
thick - thicker - the thickest
bad-worse-the worst
beautiful - more beautiful - the most beautiful
many - more - the most
interesting - more interesting - the most interesting
hot -hotter - the hottest
young - younger - the youngest

3.
There are childrenin the yard
There is a beautifui flower,a clock and books or the shelf.

4.
 Is there a monument in Lenin Square?
Are there two arm-chairs in front of the tv- set?

5. child - children
foot- feet
wardrobe  - wardrobes
house- houses
scarf  - scarves

6.
this is their book
there are their children in the bedroom
the copy-books are mine/theirs
мне кажется, что в этом задании вы опечатались,извините, а то здесь и то, и то подходит

1 My sister has bought a new dress today.
Моя сестра купила новое платье сегодня.
2 He has got a five at the English lesson. Он получил пятерку на уроке английского.
3 We have planted trees in the garden this spring. Мы посадили деревья в саду этой весной.
Отрицательные:
1 My sister hasn't bought a new dress today. Моя сестра не купила . . .
2 He hasn't got a five. . .
Он не получил пятерку на . . .
3 We haven't planted trees in the . . . .
Вопросы :
1 Has my sister bought a new dress today?
Моя сестра купила ли новое платье сегодня?
2 Has he got a five at the English lesson? Получил ли он пятерку на уроке английского?
3 Have we planted trees in the garden this spring? Посадили ли мы деревья в саду этой весной?