He says, "This, by his voice, should be a Montague." He doesn't recognize Romeo's face (it is behind a mask) but he has heard his voice before.
Verona is not that big a place; you couldn't live in it without meeting just about everyone.
Tybalt recognizes Romeo at the Capulet feast due to his voice, when he was talking/hitting on Juliet.
voice
You could ask Tybalt these questions: How did you recognize Romeo through his disguise? Were you sorry when Mercutio died?
Mercutio is woried because Tybalt is an excellent fighter
Romeo killed Tybalt after Tybalt killed mercutio.
earlier in the play, romeo crashed a Capulet party. angry, Tybalt swore revenge with a sword fight. Romeo's friend mercutio ends up fighting Tybalt, and romeo attempts to intervene by stepping between them. Tybalt stabs mercutio, despite Romeos attempts to end the fight, and mercutio dies. Romeo and Tybalt then fight, and romeo kills Tybalt, and romeo is banished from Vienna. Merutio, romeo and Tybalt sword fight.
voice
He heard Romeo's voice and just by the way he is talking, he can recognize him also When Tybalt is ready to seize Romeo and throw him out of the party, what does Capulet say to Tybalt?
romeo
Tybalt recognizes Romeo at the Capulet feast due to his voice, when he was talking/hitting on Juliet.
No Tybalt was able to him recognize by the sound of his voice.
You could ask Tybalt these questions: How did you recognize Romeo through his disguise? Were you sorry when Mercutio died?
The party-goer who was most outraged by Romeo's presence at the Capulet's party in "Romeo and Juliet" was Tybalt, a cousin of Juliet. Tybalt was quick to recognize Romeo and vowed to seek revenge for his intrusion.
Mercutio is woried because Tybalt is an excellent fighter
Romeo killed Tybalt after Tybalt killed mercutio.
Tybalt was killed by Romeo, who was angry at Tybalt for killing Mercutio.
earlier in the play, romeo crashed a Capulet party. angry, Tybalt swore revenge with a sword fight. Romeo's friend mercutio ends up fighting Tybalt, and romeo attempts to intervene by stepping between them. Tybalt stabs mercutio, despite Romeos attempts to end the fight, and mercutio dies. Romeo and Tybalt then fight, and romeo kills Tybalt, and romeo is banished from Vienna. Merutio, romeo and Tybalt sword fight.
Romeo kills Tybalt.