It's time to do sth 或It't time for sth.因为for 是介词,所以后面也可以接动词ing形式（动名词）
所以这个句子有三种说法
It‘s time to have English class
It's time for English class
It's time for having English class
It's time to do sth 或It't time for sth.因为for 是介词,所以后面也可以接动词ing形式（动名词）
所以这个句子有三种说法
It‘s time to have English class
It's time for English class
It's time for having English class