Unit 54, 55 Инфинитив после глаголов. Частица TO между двумя глаголами

Lock the door. OK. She told him to lock the door.

Why don’t you come and stay with us for a few day? Yes, I’d love to. They invited him to stay for a few days.

Can I use your phone? No! She wouldn’t let let him use her phone.

Be careful. Don’t worry. I will. She warned him to be careful.

Can you give me a hand? Yes, of course. He asked her to give him a hand.