Изменить предложение так,чтобы оно звучало более вежливо.Your room is dirty.Lizzy is weak.Rob is a short boy.This queen is bad.Your bike is old.
Isn't your room a bit messy? Lizzy doesn't seem to be very strong. Rob is not so tall a boy. This queen isn't very good. Don't you think that you need a newer bike?