At that time, he was still a student.

Do you need my stamp?

He is still an immature pianist.

At that time, I was still a student.

He is still under 20 years old.

Since he is still a green hand, he may make many mistakes.

Lately, the weather has been getting better.

He was recalling fondly the summer vacations of his childhood.

Despite his youth, he shows a surprising level of maturity.

His way of thinking has matured.