potential mood
Definition - An mode of expression that:
(1) indicates that an action or state is possible, probable, or necessary, or
(2) expresses a wish or an entreaty.

1. It is expressed by using the auxiliaries can, may, could, might, must, would, and should.

Example -

(1) I may be seen. (present tense)
(2) I might be seen. (imperfect tense)

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