The future tense is formed by using the verb WERDEN as the second idea in the sentence (for statements or 1st place (for questions) and it declines according to the subject (doer of the verb).
We also need the infinitive of the main verb at the end of the sentence or clause.
E.G - Ich werde ins kino gehen
i.e. werden = going to or will
If we have subordinating clauses e.g. weil then werden is sent to the very end of the sentence.
e.g. weil ich ins kino gehen werde