Certain prepositions (after, as, before, since, until) serve as subordinating conjunctions when they're followed by a clause: 1  You better get out of town before sundown. (Before is used as a preposition.) 2  Many people run out of ideas long before they run out of words. (Before is used as a conjunction.)
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Redwood Shores is located roughly halfway between San Francisco and San Jose, and is bordered by Belmont and San Carlos to the southwest. Foster City lies to the northwest and Bair Island to the southeast; both are separated from Redwood Shores by sloughs.edwood Shores is an affluent waterfront community located in San Mateo County on the San Francisco Peninsula in California.