Mary,______(listen) carefully in class,please!

Mary,______(listen) carefully in class,please!
Mary,______(listen) carefully in class,please!

Mary,______(listen) carefully in class,please!
listen 用原型 这是祈使句,表示请求或者命令,里面有个please 是请求

listen 祈使句，用原型

listen
Mary，请认真听课！
祈使句，用动词原形。