can modalalso adverbcause verb, base formmyalgia noun, singular or mass- so adverbmyalgia noun, singular or massis verb, 3rd person singular presentmuscle noun, singular or massaches noun, pluraland coordinating conjunctionpains noun, pluralso preposition or subordinating conjunctionthis determinercan modaloccur verb, base formwith preposition or subordinating conjunctionmetformin noun, singular or mass