（不要犹豫说“不”）
1. 别人请求帮助时，在什么情况下我们可说“不”？
2. 为什么有些人在该说“不”时不说“不”？
3. 该说“不”时不说“不”的坏处。
此文为论说文。第一段，别人请求帮助时，在违法或你无法提供帮助的情况下我们要说“不”。第二段，有人在该说“不”时不说“不”有其原因：一是怕伤了感情，二是怕将来需要别人帮助时自己被拒绝。第三段，该说“不”时不说“不”的坏处有两个方面：一是给自己带来伤害，二是给社会带来危害。
参考范文：
When asked for help, sometimes we will say “No”. For instance, if a friend who has just killed someone should borrow money from us in order to escape, most of us would not hesitate a moment to say “No” to him.
However, there are always some people who will not say “No” when they should. They choose not to say “No” chiefly for two reasons. In the first place, they don’t want to hurt others’ feelings. In the second place, they are afraid that their request for help, if there should be any in the future, would also be turned down.
What would the result be if you do not say “No” when you should? In some cases, you might not only put yourself in trouble but also bring harm to the whole society. As in the case mentioned above, if you should lend money to the murderer, you would undoubtedly be put into prison once found out. What is worse, should your so-called friend succeed in running away, he would remain a time-bomb to the society. How dangerous it would be! Therefore, we must learn to say “No” in some cases.
