How do you say

He’s been working out every day for the last three months.

..in Chinese?

他在过去三个月里每天坚持锻炼。

tā zài guò qù sān gè yuè lǐ měi tiān jiān chí duàn liàn 。

How do you say "We've known each other for three months, and he still acts like a friend." in Chinese?