①独一无二的头衔:captain of the team
②球类或棋类活动前: play football/chess
③一些有特定名称的时间段前:at dawn,before dusk,by night
④星期几和四季类名词前:on Monday,inSpring
⑤一日三餐前:have dinner,stay for breakfast
⑥介词by后出现交通工具或通讯工具:by bike/plane/mail/bus
⑦平行结构(并列名词前不用冠词):We are husband and wife.