Futurity in English is expressed either by using words that imply future action ("I go to Berlin next week") or by employing an auxiliary construction combined with the main verb which represents the true action of the sentence.
The most common auxiliary verbs used to express futurity are "will", "can", "should", "may", and "must".
Of these, "will" is the most neutral and it is the most commonly used:
Apart from that, we can also use "going to":
This is usually a little confusing for English learners but we can also use some of the present tenses to talk about the future: