A possessive pronoun is a noun the indicates possession.
Examples.
1)That is mine.
2)She owns that house.
3)That farm is their's.
1. The heavy rain poured down on us, quickly soaking us to the bone
2. We were isolated floating on the surface of the sea when a huge wave nearly drowned us
3. The food was tasty, and we easily ate it all
4. The mountains were just breathtaking and that night, after breathing in all that fresh air, we slept instantly
5. We got off the aeroplane immediately, still not believing we had almost crashed it was the start of a thrilling holiday
On the bus half of the passengers fell asleep they all have been working so hard