ПОМОГИТЕ ПОЖАЛУЙСТА РАЗОБРАТЬСЯ

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1. My friends weren’t at the cinema last weekend

2. It wasn’t very cold yesterday

3. The cats weren’t in the garden

4. My sister wasn’t in the living room

5. We weren’t at the beach last sunday

6. My father wasn’t very tired yesterday

Was - was not (wasn't) - единственное число;

Were - were not (weren't) - множественное число.