因为名词是以s,x,ch,sh结尾时，改为复数要加es: classes
These plants were distributed into 22 classes .
这些植物分为22类。
Such a student is a credit to his class .
这样的学生是全班的光荣。
He stays only at the best class of hotel .
他只住最好的上等旅馆。
The entertainment provided was first class.
提供的招待是一流的。
He is liked by the classes and the masses .
上流人士和普通民众都喜欢他。
He was always bottom of the class in math .
他的数学成绩在班上总是垫底。
Classes are much smaller at the private schools .
私立小学的班要小得多。
class为什么要加es 扩展
class班级的意思，复数加es因为是是以s结尾的名词
class为什么要加es 扩展
当名词是以s,x,ch,sh结尾时，改为复数是加es
