Most students in my country study English but can't speak it. They learn English for three years in junior high school.
If students start learning a foreign language as soon as they begin school, they could enjoy studying and improve their language skills.
Children have a natural ability to enjoy learning and playing, so we should introduce foreign language learning from a young age to help them become proficient in English.
英文について
Students study English in my country.
However, most students can't speak English.
They have to study English at junior high school.
So they learn English for three years.
Why many people can't speak English?
If they had study foreign a language as soon as start at the school, they could know how enjoy studying.
（もし彼らが学校が始まるとすぐに外国語を学びだしたら、彼らは勉強することを楽しむ方法を知れた）
Children enjoy play anything.
（子供たちは何でも楽しんで遊ぶ）
So I suppose that same English.（英語も同じだと思う）
I think that we should know enjoy study a foreign language when children.
（わたしたちは子供のときに楽しく外国語を学ぶことを知るべきだ）
We can become speak English.
（そうすれば、わたしたちは英語が話せるようになる）
I suppose that children have hart what adults don't have.
（子供たちは大人は持っていない心を持っていると思う）
It is to be interesting things or enjoy play anything.
（それは興味をもつことや、なんでも楽しく遊ぶことだ）
おかしな箇所があれば教えてください。
（）は日本語訳です
よろしくお願いします。
Students study English in my country.
However, most students can't speak English.
They have to study English (at→since) junior high school.
So they learn English for three years (at a junior high school).
Why many people can't speak English?
(Why can't many people speak English?)
If they had study foreign a language as soon as start at the school, they could know how enjoy studying.
(If they had started learning a foreign language as soon as the school begins, they would have been able to know how to enjoy learning it.)
Children enjoy play anything.
(Children enjoy doing everything as a play.)
So I suppose that same English.
(I suppose that English learning is same as this situation.)
I think that we should know enjoy study a foreign language when children.
(I think that we should know what we can enjoy studying a foreign language when we are children.)
We can become speak English.
([If so,] we can become good English speakers.)
I suppose that children have hart what adults don't have.
(I suppose that children have the mind that adults don't have.)
It is to be interesting things or enjoy play anything.
(Children take interests easily and enjoy whatever they like.)
( )内が添削文になります。時折くどい文章もありますが、なるべく御自身のアイデアを大切にしたほうが良いと思うので原文を崩さず意味が通じるように文法部分を中心に添削しました。
ご参考までに。
お礼
添削ありがとうございます！ とても、参考になりました。