it is time for class.这里为什么用for?

It is time for class.(冋义句) It is time for class 什么意思? it is time for class 也可以说 it is time to class吗? 介词可以互换? it is time for class.这里为什么用for? is it time for class?的句子成分为什么不能说is it time to class? 或者is it time for the class? It is time for class的同义句 .It is time for class.Let's stop______(read)English Class is over,it’s time（ ）for Sports Day. is,class,for,it,english ,time连成句子 for time music is it class (.)怎么造句 Oh,it is time for class的中文 It's time for class. it is time for class同义句 It is time ____have____ ________. what time is it?it is time for English class.Just a time it for Chinese is class the （连词成句） It is timtime it for Chinese is class the （连词成句）It is time for the Chinese class. it's time for English class.快 It's time—[to,for]class 把It is time for our class meeting改为同一意思的句子改成It is time _____ _____our class meeting.