Turn the following active constructions into passive:
1 They have eaten everything.
2 They haven’t put the rules into words.
3 Have they said anything?
4 Someone has stolen my collection.
5 Her mother hasn’t allowed her to go camping.
6 Somebody has damaged my bicycle.
7 Someone has taken three of my pens.
8 Everybody has checked those exercises.
9 Have you watered the flowers?
10 Somebody has stolen your new bicycle.
11 Has someone posted my parcel yet?
12 He hasn’t slept in his bed.
13 Someone has broken two of my dinner-plates.
14 Nobody has made any mistakes.
15 Has somebody done all the work?
16 Jack has visited Helen every other day since she broke her arm.