为什么是helpful to others而不是help to others？
It is very necessary to help others in our daily life. I like helping others very much. I often help my friends with their maths problems. I usually make them think over the problems themselves or think about the questions in another way instead of telling them the solution. I think to do so can help them to have their own ideas to deal with the same kinds of problems. And I feel so pleased to help others that I would like to help as many people as possible.
It is very necessary to help others in our daily life. I like helping others very much. I often help my friends with their maths problems. I usually make them think over the problems themselves or think about the questions in another way instead of telling them the solution. I think to do so can help them to have their own ideas to deal with the same kinds of problems. And I feel so pleased to help others that I would like to help as many people as possible.
2
As we all know, nobody can have a colourful life without others’ help. But in my opinion, being helpful to others will bring us more happiness. I enjoy helping others by giving them a helping hand when they are in trouble. I am patient when my classmates ask me to help them solve the questions and I am also ready to help the strangers at any time. I always feel proud of myself after helping others. I think everyone ought to be helpful and then our world will be warmer.
或者help others 因为help是及物动词，不需要介词。
常见的几种表达
1) help somebody to do something;
2) be helpful to others ,be helpful to someone 对别人是有帮助的，对某人有帮助的；
3）help to others 没有这样的表达，应该是help do something .比如：They helped clean the windows.
4）help sb.(to) do something. 比如：They helped us solve the math problems.
他们帮我们解数学题。
因为help没有这样一种固定搭配，而helpful一般这么使用
