根据要求写一篇英语作文

Last week, our class had a debate on when we have to say no if someone ask for your help.
As far as I am concert,it has the following cases.
Firstly,if we don't like a person's ask,we may say no to him or her.Secondly,if somebody's needs are beyond our power,certainly we should say no.Last but not the least,if people's request isn't convenient to us,we also say no.
However,there were sometimes that people should decline to do some things but they didn't.Reasons for this are as follows.
For one thing,if a person is too shy,she or he will not say no. For another,maybe the person doesn't know how to refuse other's ask.
From my point of view,I firmly believe that if we learn to say no properly,we will have a beautiful future at last.

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