请帮忙指出：错误的地方、语法、重点句型以及建议.

请帮忙指出：错误的地方、语法、重点句型以及建议.
Everyone has their own fear,and I also have.I used to be afraid to go swimming,because when I was young,I used to fall over the pond,then I drank a belly of water,and then I was afraid to swim.But just last year,things have changed in my friend's help,I overcame the difficulties,sincethen,I am no longer afraid of swimming.
不是错误的语法重点句型。