The document discusses the four forms used to express future tense in English: (1) going to, which is used to express plans or predictions with evidence; (2) will/won't, which expresses predictions without evidence; (3) present continuous, which refers to arrangements in the near future; and (4) present simple, which follows a schedule or timetable. Examples are provided for each form along with explanations of their usage. Links to exercises for practicing each form individually or mixed are also included.