Chinese does not have verb tenses ...
You use the same verb for past, present and future ...
My Chinese is getting better and better = 我的中文越来越好
better = 更好 (more good)
best = 最好 (most good)
越来越 = more and more
Example:
天气越来越热了 = weather (is getting )more and more hot
subject + 越来越 + adjective ... = subject is getting more and more adjective