Нужно составить предложения,глаголы нужно в 3форму has/misha/in the sea/swum/. you/met/famous/have/people/? built/never/has/he/a house/. just/they/have/in the park/walked/.

Has Misha swum in the sea?
Have you met famous people?
He has never built a house.
They have  just walked in the park.