Помогите пожайлуйста с английским!!!

Putt he sentences into passive voise.Mind the tenses.

1)Jill uses the computer quite often
The comruter ... by Jill quite often
2)The secretary defender some colleagues
Some colleagues ... by the secretary
3)Picasso painted this picture
This picture ... by Picasso
4)Last year they published ten books
Ten books ... (by them) last year
5)Molly hasknitted this cardigan
This cardigan ... by Molly
6)Next year George will visit Marcin London
Next year Marc ... by George in London
7)Jim has opened the window
The window ... by Jim
8)Lucy buys many books
Many books ... by Lucy
9)David has written some letters
Some letters ... by some
10)Benjamin Franclin invented lightning conductor
The lightning conductor ... by Benjamin Franclin
11)All studentshave learned irregularverbs
The irregular verbs ... by all students.

1) The comruter is used by Jill quite often. 2) Some colleagues are defended by the secretary. 3) This picture was painted by Picasso. 4) Ten books were published by them last year. 5) This cardigan has been knitted by Molly. 6) Next year Marc will be visited by George in London. 7) The window has been opened by Jim. 8) Many books are bought by Lucy. 9) Some letters have been written by David. 10) The lightning conductor was invented by Benjamin Franclin. 11) The irregular verbs have been learnt by all students.