Answer:
Individual steps in a case should be written in the form e. Subject, Verb, Direct Object, Preposition, Indirect Object.
Step-by-step explanation:
A use case implies the description of an action or activity. In other words, it involves a description of the actions that a a person will have to do in order to carry out a process. The syntactic structure of the instructions should always be in the direct form, so as to be clear and avoid any mistakes in the process. For example:
"In case of emergency, (you) [Implicit Subject] use [Verb] the hammer [Direct Object] to break the glass [Indirect Object]"