* Adverb: This is the most common use. It describes the direction of movement or progress.
* Example: "The car moved forward."
* Adjective: Describing something that is directed towards the front or future.
* Example: "She is a forward thinker."
* Noun: Referring to the front part of something.
* Example: "They were sitting in the forward section of the plane."
* Verb: Meaning to send something ahead or to advance.
* Example: "They forwarded the email to the boss."
To determine the part of speech, you need to consider its function in the sentence.