3 Write sentences about these situations using the third conditional. You didn't laugh at your friend's joke because he forgot the punch line. If my friend the punch line, I 1 2 You didn't know your favourite sitcom was on so you didn't watch it. If I. my favourite sitcom was on, I _it. 3 We knew the film was funny because we had seen it. If we the film, we it was funny. 4 You got into trouble at school because you laughed in class. If I_ in class, I into trouble at school. leg.​