あ、なるほど。そうです。 人を紹介する時に[it is...]じゃなくて、[this is...]は正しいです。ただ誰かが[who is that?]と言いったら、[it is..]と[that is]はいいです。分かりますか？ you're right, if you introduce someone as "it" to other people then it's wrong; that's not a proper way to introduce someone. but if someone asks "who is that?" then you can say "it's jack bauer" or "that's jack bauer". do you understand?