摘要

<正>1.我们将在一两天内返回。误:We’ll come back in one or two day.正:We’ll come back in a day or two.正:We’ll come back in one or two days.析:in a day or two是固定词组,意为"一两天内",a不能用one替换。2.他们三三两两地来了。误:They arrived by two and three.正:They arrived by twos and threes.析:by twos and threes意为"三三两两地,零零落落地",是固定词组,基数词用作可数名词复数。