havehave(原形)-has(三单[第三人称单数])-had(过去式)-having(进行时)扩展资料常用词组 had better do sth 和 have sth to dohad better 是一个固定词组，用于表示对别人的劝告，建议或表示一种愿望。
had better 后面必须跟动词原形had better do sth. 最好干某事 1. 你最好立即去医院看病You'd better go to hospital at once2. 你今天最好去哪儿You'd better go there todayhad better 人称和时态的使用1. 你（他，我们）现在最好听老师的Now you(he, we) had better listen to the teacher2. 你最好安静一些You had better be quiet3. 你最好明天动身You had better start tommorrow4. 我们最好现在就看电视We had better be watching TV
had的原形
