Prepositions
While many people struggle with prepositions, there is an easy way to know if something is a preposition even if you are unsure what they all are. Imagine a plane and a cloud. Anything a plane can do with a cloud is a preposition. For example it can fly into, out of, though,above, below, to the left, to the right, between two clouds, over , and under. There are more examples, but this should give you a good idea of what prepositions are.