Then he seemed to notice something for the first time.

Her head came up as she noticed him for the first time.

I notice for all your work you cannot answer that question.

But no one noticed for more than a year after that.

Her eyes, he noticed for the first time, were green.

He looked around and noticed it for the first time.

She noticed for the first time that no one was talking.

He noticed her for the same reason most people do - she was always talking.

That was the last thing I noticed clearly for quite a time.

He looked around and noticed for the first time that everyone had stopped what they were doing.