同学你好，该知识点来自沪江网校《英语零基础直达大学六级【全额奖学金班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
He first thanked the pupils who came to the dinner, and then he said that he will forever remember pupils past and present.
will改成过去式would，pupils前可以加his，表示他的

In forty-years as headmaster, some of the pupils has already grown up and they were successful in their careers.
In forty-years as headmaster去掉，不然就成了主语the pupils作为校长了
has改成过去式had

Mr. Page especially enjoyed recalling the humorous incidents with pupils.
pupils前加the特指

He also thought about his future.
thought可以改成talked，谈论

He said that the old pupils were welcome to come and visit him.
the old pupils可以改成his students 他的学生

After he has retired, he will devote himself in gardening.
in改成to，devote yourself to sb/sth 献身；致力；专心

祝同学学习进步~