ordinary 强调“平常的”、“平淡无奇的”,
如：His ordinary supper consists of only bread and milk.他通常的晚餐不过是面包和牛奶.
common 强调“常见的”、“ 不足为奇的”,
如：Colds are common in winter.感冒在冬天很常见.
general 意为“普遍的”、“一般的”如：This book is intended for the general reader,not for the specialist.这本书是为一般读者写的,不是为专家写的.
usual 强调“通常的”、“平常的”,
如：Tea is considered to be the usual drink of British people.茶被认为是英国人的日常饮料.
normal指“正常的”、“正规的”、“常态的”,
如:the normal temperature of the human body 人的正常体温 ordinary 强调“平常的”、“平淡无奇的”,
如：His ordinary supper consists of only bread and milk.他通常的晚餐不过是面包和牛奶.
common 强调“常见的”、“ 不足为奇的”,
如：Colds are common in winter.感冒在冬天很常见.
general 意为“普遍的”、“一般的”如：This book is intended for the general reader,not for the specialist.这本书是为一般读者写的,不是为专家写的.
usual 强调“通常的”、“平常的”,
如：Tea is considered to be the usual drink of British people.茶被认为是英国人的日常饮料.
normal指“正常的”、“正规的”、“常态的”,
如:the normal temperature of the human body 人的正常体温