needn't feed
runs after1.He mustn't(feed his dog at the table.)2.You should play with your pet(for some time every day.)1、2都对括号内提问What mustn't he do? （对动作提问用what)How often should you play with your pet?（对程度、频率提问用how often)������һЩ����Ϣ�������Ƿ����They have()()to tell us.Mike,I have()to tell you.��important something����1.something good2. something important