Some teachers have noticed an improvement in student behavior since the attacks.

This combined with their small size accounts for why most species have only been noticed and classified since 2001.

She had not noticed it before, since the ring.

"I have noticed a serious decline in business since last summer in the States," he said.

"Connie, have you noticed any change in the major's behavior since the Burke incident?"

I have not noticed any tolerance change since the first time that i took it.

She said she has not noticed any difference in the two sides of her face since the operations.

You haven't noticed the real world since the dawn of time!

It was one of the many changes that people in the company had noticed since the death of his daughter, three years before.

The college has noticed various changes in its infrastructure since its foundation.