As an example, write 3 sentences on the board about yourself
Make two of them true and one false
I speak 5 languages
I never learned how to ride a bike
I have eaten snails
I have been to New York two times
I don’t like to eat seafood
I have never drunk alcohol
Ask the students to guess which one is false.
Now the students each write 3 sentences about themselves (two true; one false) and they read them to the other students. Everyone tries to guess which one is false and to see how well they know their classmates.
You can also have students come up to the board and write their sentences. This way, you can correct their grammar and spelling at the same time. Or you can collect their papers and correct them at home and go over the mistakes in the next class.
You can also change the game so that everyone must ask questions to determine which one is false, but the person must answer the questions as if all of them are true.