She had changed so much that I couldn't recognize her. ✬

I didn't recognize him at first. ✬

I didn't recognize him at first on the train. ✬

She didn't appear to recognize me. ✬

I wonder if she'll recognize me after all these years. ✬

He wore a mask so no one would recognize him. ✬

Did you recognize your old classmate? ✬

I don't recognize this shirt. Whose is it? ✬

Tom had changed so much that I didn't recognize him. ✬

Tom didn't recognize Mary. ✬