Future indefinite tense indicates actions that have not occurred yet and will take place at some point in the future. There are affirmative, negative, and interrogative sentences in future indefinite tense. Affirmative sentences use will or shall with the subject and first form of the verb. Negative sentences add not after will or shall. Interrogative sentences either begin with the helping verb or a wh- word followed by a question mark. Interrogative sentences with negatives use the helping verb or wh- word followed by the subject and not before the first form of the verb.