It's difficult to make sentences using interrogatives.

It's difficult to make sentences using infinitives.

The interjection 'Ah!' expresses his surprise.

He is not necessarily wrong.

He expresses numbers using numerals.

Yushi is my best friend.

That person is my friend.

When the strong shaking occurred, we immediately evacuated.

He is very careful in his choice of diction.

He is very careful in choosing words and phrases.