Parts of Speech
What is the preposition in the following sentence: Plants were the first living things on earth.
What is on?
These words are used to join two other words or phrases: for, and, nor, but, or, yet, so
What are conjunctions?
This is the job of a preposition...
to show a noun's place, time, or direction.
words that tell a noun’s place, time, or direction
What is a preposition?