It's time to have English classes.为什么class要变成复数?

It's time to have It's time to have a class.还是It's time to have class. And it's time to have some good time! It's time for lunch.It’s time to have lunch.It's time for lunch.It’s time to have lunch.翻译! It's time to have breakfast.（改为同义词：It's time ______ breakfast.） It's time for me to have breakfast.同义句It's time()my(). It's time to have ciass now!It's time for ciass.的意思 It's time to have class (改为同义句)It's time ------------------------ It's time to It's time to it·s time to have breakfast改为同义句 It's time to have breakfast(改为同义句) It's time to have a rest.改为同义句 It's time to have lanch?翻译成中文 同义句It's time to have breakfast. 同义句It's time to have an English class It's time to have the meeting.同义句 It's time to have lunch.改为同义句