Mr Liu was my math teacher when I was in a primary school.He (was knowledgeable) and friendly.And (he was) very kind.
How time flies!Now I (study) in a (middle) school.(But I have never forgotten him).
(I was very lazy when I was a grade six student.) And I often (forgot) to do my homework.One day,Mr Liu let us ( pass) the homework to (him).But I didn't (do) the homework yesterday.And the monitor (told) it to Mr Liu.I was very nervous when Mr Liu was (talking)to me outside the classroom.He (didn't criticize me anything) .He only (only told a funny story)to me .And I was very regretted.
This is my favorite teacher,How great he is!(觉得这个结尾有点生硬,伟大应该不容易看出来吧,和蔼还差不多）
我写个结尾.
（He is my favourite teacher.How kind he is!)
我括号里的是给你改 的 想的还不错,但是语法错误还是多的,自己注意.我的供你参考呵呵.