In place the wold alone , substitute the preposition by + the required reflexice pronoun
1.He went for a walk in the park alone
He want for a walk in the park.........
2.They made the long trip through the woods a lone
........................................
3,I don't like to go to the movie alone
.........................................
4.Mary,however,prefrs to go to the restaurant alone
.............................................
5. Mike like to take long waiks in the woods alone