It's time to go to school. 改为同义句,请说出理由.

问题描述:

It's time to go to school. 改为同义句,请说出理由.

It's time for school.=It's time to go to school.介词for后面只能只名词、代词、动名词作它的宾语。
To go to school是不定式段语,在句子中是真正的主语,it是形式主语。句型结构:有两种
It be(is/was)+名词+to+动词原形
It be(is/was)+名词+介词for+名词/代词/动名词
另外、It be(is/was)+形容词+for sb+to +动词原形也是常见句子

it's time for school
time to= time for