これから先何が起きるかだれも分からない。

after this

previous; prior; former; some time ago; preceding; point (e.g. pencil); tip; end; nozzle; head (of a line); front; ahead; the other side; the future; hereafter; destination; the other party

what; how many; you-know-what; that; whatsit; what's the expression; what do you call them; what?; hey!

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to get up; to rise; to blaze up (fire); to wake up; to be awake; to stay awake; to occur (usu. of unfavourable incidents); to happen; to take place

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way

who

too; also; in addition; as well; (not) either (in a negative sentence); both A and B; A as well as B; neither A nor B (in a negative sentence); even; as much as; as many as; as far as; as long as; no less than; no fewer than; even if; even though; although; in spite of; further; more; again; another; the other

to understand; to comprehend; to grasp; to see; to get; to follow; to become clear; to be known; to be discovered; to be realized; to be realised; to be found out