roofon Basic wordsalso onCEFR Elementary (A2)? CEFR Mastery level (C2)? Band 1 (BND1)? 屋顶,房屋,最高部 roofs roofs(noun) 顶(roof的名词复数) rooftop rooftop(noun) 屋顶 rooftops rooftops(noun) 屋顶(rooftop的名词复数) roof roof(noun) 屋顶,房屋,最高部 Forms noun roofs rooftop rooftops roof