Chemical Handling Procedures

verb An action word that indicates an action or a state of being. In this case, 'touch' is a verb that refers to physically making contact with something.

adverb A word that modifies or describes a verb, an adjective, or another adverb. In this case, 'not' is an adverb that negates the action of touching.

preposition A word that shows the relationship between a noun (or pronoun) and other words in a sentence. In this case, 'not' is used as a preposition to indicate the absence of touching.

• It is important to not touch the delicate equipment without proper authorization.
• Hey, don't touch that! It's off limits.
• Hands off! That's not for you to touch.
• Some things are better left untouched, like memories of the past.