Поставьте предложения в скобках в Present Simple, Present Progressive и Present Perfect Tense.
He is a very hard worker. He often (work) until midnight. It's 11 p. m. now and he still (work). It's 3 p. m. and he (not eat) anything today. Is Mary ready to come out? - No, she still (dress). He often (read) detective stories ; he (read) a very good one now. She (not have) a holiday since 1986. What are they talking about? - They (talk) about literature. They always (talk) about literature when they see each other.