scale noun, singular or massmight modalbe verb, base formused verb, past participle– proper noun, singularit personal pronounsuggests verb, 3rd person singular presentfive cardinal numberdifferent adjectivegrades noun, pluralof preposition or subordinating conjunctiondyspnea noun, singular or massbased verb, past participleon preposition or subordinating conjunctionthe determinercircumstances noun, plural
and coordinating conjunctionit personal pronounjust adverbmakes verb, 3rd person singular presentit personal pronouneasier adjective, comparativefor preposition or subordinating conjunctionthem personal pronounto tobreathe verb, base formbecause preposition or subordinating conjunctionof preposition or subordinating conjunctionthat determinerdyspnea noun, singular or massassociated verb, past participlewith preposition or subordinating conjunctioncopd proper noun, singular.
exertional proper noun, singulardyspnea noun, singular or mass, which wh-determinercan modalprogress verb, base formto toresting verb, gerund or present participledyspnea noun, singular or mass, fatigue noun, singular or mass, wheezing verb, gerund or present participleand coordinating conjunctionchest noun, singular or masstightness noun, singular or mass.