中译英 我5岁开始学英语。（2种）

i began to study English when i was 5 years old.

i began to study English as early as 5 years old.

I began to learn English when I was 5.
I began to learn English at the age of 5.

(p.s.:是begin to do 而不是begin doing啊！）

I began learning English when I was five.
I began learning English at the age of five

I started to learn English when I was five.
I begin learning English at 5.

I learned English when I was 5.
I began learning English when I was 5.