This book in possession, is something my grandfather collected when he was young.

We like to gather seashells on the beach.

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 is still young.

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

He is still young, so he needs to learn a lot of things.

My grandfather is healthy and living a long life.