(Examples: he will come tomorrow, she must do it immediately, not him, nor she must.) In addition to the auxiliary message function, can be, do and act as the main verbs: a list of verbs that can (may) act in English as auxiliary offal is as follows: I will also explain how these rules work in more complicated sentences. For example: sentences in which the subject is a subject sentence or where the subject and verb are separated by a relative sentence. So far, we have examined topics that can create confusion in the subject-tilt concordance: composite subjects, subjects of group composition, subjects of singular plural importance, and indeterminate subjects. But if the subject is plural, then the verb must be plural.