It is important to understand the importance of health.

His explanation was impossible to understand.

He told the story using the past tense.

Learning how to use past participles is important for understanding English.

He learned the past tense in Japanese.

Please check the archives of the BBS.

My room is on the second floor, and your room is above mine.

Tanaka-san, have you finished the report?

Mr. Ue is my best friend.

I had a picnic at Ueno Park.