You can learn to english by yourself before the new teach come.

问题描述:

You can learn to english by yourself before the new teach come.

你可以在新老师到来之前自学英语。

在新老师来之前,你们可以自学英语。

修正建议:
"You can learn English by yourself before the new teacher arrives (comes).
注:
teach教=动词,teacher=名词(教师)

在新老师来以前,你可以/能自学英语。