Das Futur I
In English and in German, we can talk about the future without explicitly using the/a future tense. In German, we can use the simple present (Präsens) plus an adverb of time (‘morgen,’ ‘übermorgen,’ bald,’ ‘nächste Woche, etc). In English, we can use the present continuous to talk about the future. (I am going to school next week.)
To form the actual future tense in German, we use the auxiliary verb "werden". This is the only variant, whereas in English we can either use "will" or "am/is/are going to".
The conjugated form of "werden" will be in second position, and the second verb will move to the very end of the sentence.
Ich werde ein Fahrrad kaufen.
I will buy a bike.
The main verb ‘kaufen’ carries the meaning of the sentence, and ‘werden’ is just used to indicate the future tense, much like the English equivalent ‘will.’ Further, ‘werden’ can be used as a main verb in the future tense:
Du wirst frustriert werden.
You will be getting frustrated.
In addition, the adverbs ‘wohl,’ ‘wahrscheinlich,’ and ‘vielleicht’ (highly likely, probably, maybe, respectively) are added to speculate (e.g. Hannah wird wahrscheinlich nicht zur Party kommen.). There are two forms of the future (Futur I & II), the latter being the future perfect.