This morning I took my car to the garage to have them check the air-conditioner.这句话的句型结构?为什么用了两个to?

This morning I took my car to the garage to have them check the air-conditioner.这句话的句型结构?为什么用了两个to?
This morning I took my car to the garage to have them check the air-conditioner.
这句话的句型结构?为什么用了两个to?

This morning I took my car to the garage to have them check the air-conditioner.这句话的句型结构?为什么用了两个to?
第一个to是介词,表示方向,常见结构：take ...to ...
意思是带某人或某物到某地
第二个to是动词不定式符号（动词不定式是由to +动词原形构成）,to have them check the air-conditioner.
这是动词不定式做目的状语.
我开车去车库想要他们给检查一下车的空调器

不定式做谓语表示方向和目的
第一个to是方向 向停车库走去
第二个to是不定式 表明他要去做的事情

第一个TO 是地点,第二个是去干了什么事
i took my car to the garage
i took my car to have…句子主干在这句，其他都是附加成分了