math (class) class加es么 为什么

math (class) class加es么 为什么 I have math class ____three hours 横线上加什么 have a math后面可以不加class吗 句子“I have 2 math class.”中“class”用不用加“es”? 一节科学课 a math class 英汉互译一节科学课到底加不加class 为什么Chinese 不加class 英语翻译是不是Olympic Math class The students in Class One were having a P.E class()we were having a math class.A.when B.while C.asD,since class class Class my math class is hard同义句 He is____ talking in math class have P.E.class have P.E.class class怎么加s I need a ruler for my math class.(改为一般疑问句）what ( )( )( )( )your math class my math class is hard my math class is ___ ___ in P.E.class还是in the P.E.class?