用方框中所给的情态动词完成下列句子 can ’ t would may must shall shouldn ’ t 1. — I go out to play now,Mum? — No,you mustn ’ t . 2. you like to have a walk with us this evening? 3. You be careful when you cross here — the traffic lights aren ’ t working . 4. We were all waiting for you . You have left for the seaside by yourself without leaving a message . 5. He be tired . He has just begun to work . 6. — he use your bike? — Certainly . Here is the key .