It's my first time crossing the river by sampan.

He is cutting a plank.

He crossed the river by sampan.

He went to Japan for the first time.

He ate sushi for the first time.

It was only after talking to him that I understood how smart he was.

He went to school by crossing the bridge.

We often have picnics by the river on weekends.

He built a house using boards.

We often have picnics by the river on weekends.