We don't have a future tense... but we do have LOTS of ways of expressing the future! We can add 'will' - but be careful as 'will' can be used to express other things, and can even be used for the present and past! (She will have eaten all the cake by now = she ate all the cake and now there is none for us! - this is the future perfect used to express time up till the present 'by now') I'm going to... I hope to... I would like to... can all be used. The present continuous can be used... I'm meeting my friend tomorrow in Paris. Even the present tense works... The train leaves tonight at 8 o'clock. As there are SO MANY ways, and SO MANY things to be careful of, consult a grammar book, or an online website, Then start learning one or two ways of expressing the future. Practice them. Then learn another way or two, and practice. Don't try to learn everything at once! It will be very confusing!

[pronoun] + will/am going to + [verb] "I will eat." "I'll eat." "I am going to eat." "I'm going to eat."