The document discusses different ways to express future tense in English. There are three main forms: simple future using "will", simple future using "be going to", and present continuous for future arrangements. Simple future with "will" expresses long-term or indefinite future actions, while "be going to" indicates plans or predictions that will happen soon. Present continuous can discuss future plans or arrangements paired with time expressions like "tomorrow". The future progressive and future perfect tenses are also formed using "will be" or "will have" plus a present/past participle verb form respectively.