1) a: Mum, please don't make me take the medicine.
b: I know it tastes awful, Jake, but it will help you (to) get better.
b: She went to visit her friend Lucy.
3) a: I don't know how to send a text message.
b: I can show you.
4) a: What are you looking forward to doing next week?
b: I'm looking forward to visiting my friends next week.