• His family isn’t large. （他的家庭不⼤。）（家庭单位，单数）
• His family are all music lovers. （他的家⼈都喜欢⾳乐。）（家庭成员，复数）
• The enemy has suffered heavy losses. （敌⼈遭受了严重损失。）（整体概念，单数）
• The enemy are running for their lives. （敌⼈们正在逃命。）（具体数量，复数）
• The secret to public speaking is to get the audience on your side. （当众演讲的秘诀是，⼀定要让听众⽀持你的观点。）（突出整体，单数）
• She lectures to audiences all over the world. （她向世界各地的听众发表演讲。）（突出个体，复数）
• We need to buy some new furniture. （我们需要买⼀些新家具。）（整体概念）
• a piece of furniture （⼀件家具）（具体数量）