①引导的条件句,而是通过其他手段来代替条件句。① I was ill that day. Otherwise , I would have taken part in the sports meeting.( ( 副词)② ② He telephoned to inform me of your birthday, or I would have known nothing about it. (连词)③ ③ I might have given you more help, but I was too busy.( ( 连词) 11. 用在may+ 动词原形 表“祝愿”。may 放在句首。例:May you be happy !