He was a witness to the incident.

He witnessed the incident.

He measured the lumber using a square.

He often misses school because of his sickliness.

He is sickly and often misses school.

Tokyo is the largest administrative region in Japan.

He was wearing a new vest.

Dessert is a separate stomach, so I can always eat it.

He solved the problem using an old slide rule.

In her room, a canary is singing.