The basic French sentence follows the same subject-verb-object order as English: Marie mange une pomme (Marie eats an apple). Where French diverges most is with pronouns, which move before the conjugated verb instead of staying in object position: Marie la mange (Marie eats it), not Marie mange la.
Adjectives are the other major difference, since most go after the noun rather than before it (une pomme rouge, a red apple), and adverbs of frequency or degree often sit right after a simple conjugated verb rather than before it, as in English: je mange souvent des pommes (I often eat apples), not je souvent mange.