英语演讲稿,帮我看一下有没有语法错误

英语演讲稿,帮我看一下有没有语法错误
First of all I think that it is most important to be grateful for being able to live healthily.Many people who may have many difficulties in their lives and may give up their lives and commit suicide because of that.However it is actually very fortunate to have a healthy mind and body.There are countless people in the world who are sick and in pain or having family members who are sick and in pain,which then in comparison,having a healthy body is so fortunate.Also I am always grateful for having a good family.I have got parents who love me very much and do everything that is good for me.They are the people who have known me for the longest time and always offer me support,confidence and safety.After that I also think that I am very fortunate to have good and nice people around me.My classmates,friends,teachers are all people who are trustworthy and always treat me so nice that I think they are treating me like their own family members.
Actually there must be many things to be grateful for in everyone's life.However,I think that we shall all be grateful for the same thing,that we are all able to live in such a beautiful world!
最好能加一些高级句式.