Look at these rules for the computer game. write sentences with ‘must’ and ‘mustn’t’.
example 0. find the magic key. answer 0.you must find the magic key.
1. don’t let the guards catch you. 2. find some coins. 3. give the flowers to the princess.

1) Ralph was repairing his bike in the yard yesterday all evening long.
2) Sam didn't go to the cinema with his friends the day before yesterday.
3) Polly and Rose were playing with their dolls in the sitting room when their parents were watching a film on TV.
4) The boys were sitting near the fire when Willy came.
5) Mark was reading a very interesting novel when his friend Frank called (=rang). 
6) Why wasn't Meggy preparing for her exams yesterday all day long?
7) Whom was Paul going for a cycle ride with at that time?
8) Yesterday Fred and Grace were walking in the streets of Madrid all morning.
9) Yesterday children were swimming (=bathing) in the river all day long.
10) Where were you working the whole yesterday morning?
11) Mike was fishing in the river while Dolly was making jam in the kitchen.
12) Whom was Bessy dancing with when her mother came home?
13) Yesterday at 6 pm I was sitting on the bench in the garden with my friend Emily. 

1/ Ralph was repairing his bike in the yard the whole evening yesterday . 
2/ Sam didn't go to the cinema with his friends the day before yesterday. 
3/ Polly and Rose were playing with their dolls in the living room when their parents were watching a movie on TV. 
4/ The boys were sitting next to the fire when Willy came. 
5/ Mark was reading a very interesting novel when his friend Frank called him. 
6/ Why wasn't Meggy preparing for her exams the whole day yesterday? 
7/ Whom was Paul going to ride a bike at that time yesterday? 
8/ Yesterday Fred and Grace were walking along the streets of Madrid all morning. 
9/ Yesterday children were swimming in the river the whole day.
10/ Where were you working the whole yesterday morning? 
11/ Mike was fishing in the river while Dolly was making jam in the kitchen. 
12/ Who was Bessy dancing with when her mother came home? 
13/ Yesterday at 6 p.m. my friend Emily and I were sitting on the bench in the garden.