What are the different types of clauses? | Lexico.com
https://www.lexico.com/grammar/clausesUsing relative clauses. Have you ever wondered about when to use that and when to use which or who in this type of sentence? In fact, for much of the time that is interchangeable with either of these words. For example: √ You’re the only person who has ever listened to me.. √ You’re the only person that has ever listened to me.. √ It’s a film that should be seen by everyone.