1. Let him  studystudyingto study dinosaurs if he wants to!

2. I was watching a movie when I heard the door  slamslammingto slam.

3. She would like  makemakingto make her husband  discoverdiscoveringto discover her native country.

4. I do like  swimswimmingto swim, so why are you saying that I can't bear  gogoingto go to the swimming-pool?

5. She made him  telltellingto tell her the truth. She even scared him into  admitadmittingto admit that he had committed more than one crime.