Subordinating Conjunctions by Function Time after, whenever, since, as soon as, before, once, until, till, by, by the time, when, while Cause/Reason because, since, as, inasmuch as, now that, why Condition if, if only, in case, supposing, assuming that, unless, even if, only if, provided, provided that, as long as Purpose so that, in order (that), lest Comparison / Manner as if, as though, as much as, just as, than Relative / Nominal Clauses that, which, whichever, who, whoever, whom, whomever, whose, what, whatever Place Where/wherever