帮我检查一下语法有没有错误

帮我检查一下语法有没有错误
这是我的演讲稿,请帮我检查一下!
Hello!My name is×××.I'm a boy.I'm twelve years old.I live in ××.I'm a student.
Olympic Games is at hand.Therefore today I will tell your some sports.I like to play sports.For example ping-pong,badminton, tennis.Always play sports is good for your body.Playing sports helps make your body healthy and strong.I like badminton best.I play badminton to gym with my father.About once a week.
Olympic Games is near.I can sit beside TV to yell for Chinese player.I cansay to them:"One world,one dream!"
Now I singing a Olympic song.
see the fire in the sky
we feel the beating of our hearts together
this is our time to rise above
we know the chance is here to live forever
for all time
hand in hand we stand
all across the land
we can make this world a better place in which to live
hand in hand we can
start to undrestand
breaking down the walls that come between us for all time
a li la