zhè gè / shā fā / yī dā liǎng yòng / bái tiān / kě yǐ / zuò / wǎn shàng / kě yǐ / shuì

这个沙发一搭两用，白天可以坐，晚上可以睡。

This sofa serves two purposes – you can sit on it during the day and sleep on it at night.