Je mag 'who'en 'which' ook vervangen met 'that'' tenzij er een komma voor staat.
1. Is that the man who gave you a compliment? > Is that the man that gave you a compliment?
2. I like the song which is on the radio now. > I like the song that is on the radio now.
Bij deze zinnen mag je dus geen 'that' gebruiken omdat er een komma voor staat.
- My phone, which I just bought last month, is already broken.
- The painting, which hangs in the living room, was a gift from my grandmother.