1. a. My uncle started to laugh very hard at us!
1. b. My uncle started laughing very hard at us!
2. a. Alice began trying to turn off the stove.
2. b. Alice began to try to take the pan off the stove.
3. a. The children loved to go through a dark tunnel.
3. b. The children loved going through a dark tunnel.
4. a. Robert tried to make a pie with apples.
4. b. Robert tried making a pie with chocolate pudding.