小學５年級英文一問

呢句係指「由你3歲開始就係學生)
用Since都可以
You have been a student since you are three-year-old.

呢句係解:你三歲的時候,已經係一個學生

你係3歲果陣已經係一個學生.
since you are three years,you are already a student

從三歲開始,你已是一名學生

可唔可以 from改用since..
since都係解＜從＞．．．

你從三歲開始,已是一名學生。