The document discusses various ways to express future tense in English including:
1) Future progressive tense using "will be" to talk about actions that will be in progress at a future time.
2) Simple future tense using "will" to make predictions, plans, or promises about the future.
3) Using the present progressive as future by saying "I am doing" to talk about intentions or planned actions.
4) Future perfect and future perfect progressive tenses using "will have" to talk about actions that will be completed or ongoing up to a specific time in the future.