Объяснение:
1 Somebody found the pictures in an old house.
The picture was found in an old house.
2 Naomi and Simon won the first prize.
The first prize was won by Naomi and Simon.
3 The police didn’t catch the art thief.
The art thief wasn’t caught by the police.
4 They didn’t sell the portraits yesterday.
The portraits weren’t sold yesterday.
5 Somebody took that big sculpture on Friday.
That big sculpture was taken on Friday.
6 Pablo Picasso painted these masterpieces.
These masterpieces were painted by Pablo Picasso.
7 A famous artist opened the exhibition.
The exhibition was opened by a famouse artist.
2. The day would have been fine if they hadn't argued.-Conditional III-в придаточном Past Perfect,в главном would have Verb lll
3 If you recycled the litter the environment would be cleaner.-Conditional II- в придаточном Past Simple,в главном would Verb l
4. If you didn't come so early they wouldn't get up.-Conditional II- в придаточном Past Simple,в главном would Verb l
5. What would you do if you won a lotterty?-Conditional II- в придаточном Past Simple,в главном would Verb l
6.If I were you,I would never ask him for help.-Conditional II- в придаточном Past Simple,в главном would Verb l
7. What would you have done if the computer hadn't worked?Conditional III-в придаточному Past Perfect,в главном would have Verb lll
8 It would be better if you didn't go there.-Conditional II- в придаточном Past Simple,в главном would Verb l