- That (personen/dingen) -> geen komma's
The man you saw is the killer = 1e voorkeur
The man who you saw is the killer. = 2e voorkeur
The man that you saw is the killer = iets informeler
- Which (dingen) -> kan met komma's!
The lesson, which was quite boring, finished at 3 o'clock in the afternoon. (met komma's = uitbreidend/extra info)
The lesson which she needed to attend started at 9 o'clock. (zonder komma's = beperkend/restrictive -> je bedoelt alleen deze les)