The general structure is exactly the same as the Present Simple, but we add a future adverb of time on the end: SUBJECT + INFINITIVE VERB + OBJECT + FUTURE ADVERB OF TIME
The verb “to be” is conjugated as usual.
Third person: We add S to the end of the verb, unless it ends with a Z, S, CH, SH or DGE sound, in which case we add ES and it is pronounced with an extra syllable.
E.g.: She starts at 10 tomorrow and It comes at 9, but It finishes at 11 next week and The Moon passes in front of the Sun at 12:45.