this determiner train noun, singular or mass operates verb, 3rd person singular present both determiner freight noun, singular or mass and coordinating conjunction passenger noun, singular or mass cars noun, plural that wh-determiner have verb, non-3rd person singular present helped verb, past participle the determiner country noun, singular or mass develope proper noun, singular exponentially adverb in preposition or subordinating conjunction the determiner past adjective century noun, singular or mass .