My dream is to travel the world.

At that time, I was still a student.

Lately, the weather has been getting better.

At that time, he was still a student.

He was recalling fondly the summer vacations of his childhood.

He was wandering the world when he was young.

He seems to be enjoying a life of acting as he pleases.

He is wandering the world alone.

He is still young.

He is still young, and looking forward to his future life.