1、多重否定不当改成：为了防止生病，我们要坚持锻炼身体。2、语序不当改成：收听和记录3、缺少主语去掉“通过”或者“使”4、成分残缺在句末加上：的横幅。希望对你有帮助，祝你学习进步，更上一层楼！(*^__^*)

修改病后：六年级部分老师带领同学参加了英语文化会。

六年级的一部分老师和全体同学参加了英语文化会。

主要是语病的问题，歧义部分六年级老师和同学。

Good morning/afternoon/evening,my dear teacher and classmates, today my topic is my family. I have a small, but very warm family.There are only three of us: my father,my mother and I. My father is a salesman, my mother is a nurse, and I am a student. There's a lot of fun in my family. My dad has a good sense of humor which can always get our laughter.Mum and dad love me very much, and I love them too. My family is http://www.rixia.ccalso very harmonious . I love my family and I hope you will like it too!
That's all,thank you!