* Verb: This is the most common usage, meaning to perceive something with your eyes.
* Example: "I saw a bird fly by."
* Noun: This refers to a tool used for cutting wood.
* Example: "He used a saw to cut the board."
* Past tense of "see": This is a verb form indicating an action that occurred in the past.
* Example: "I saw you yesterday."
To determine the word class, consider the sentence and its meaning.