本人接电话： Is that you, John?This is he/she. 找别人的： Tell Mary we'll be late for dinner this evening. Hold on, please. Just a moment please. 上学/上课/迟到 找的人不在： be late for school/ class (that) Sorry, he is out. Can I take a message
Yes, speaking. I'm afraid I don't understand. (that) 宾语从句