Question: I was reading New Practical Chinese Reader Chpater 27 and stumbled upon the following sentence: 我把你们带到茶馆来。 While the meaning of the sentence is pretty clear, I have trouble understanding its underlying structure and hope someone can help me.

Thus far I figured out: You use 把 together with 带到 that something has been moved from one to place to another. In this case: The place of 你们 to 茶馆。

However, what is the idea behind 来 ？

Google translate provides the following translation for the two sentences:

我把你们带到茶馆来。I will bring you to the tea house.

我把你们带到茶馆。I will take you to the tea house.

Considering the context of these sentences however: The action all took place in the past. That's why I am a bit wary about Google Translate suggestion. 

Can someone explain what the underlying structure of the sentence is - what can be deduced / what cannot be deduced?

Answer: 
bkrs: (Ru) after VP 4) -lai, lái indicates completion (result) of action by main verb 
信笔写来,一觉醒来,这人看来年纪不小, 你且听我道来, 屈指算来, 已经十五年了,说来话长 

＂现代汉语词典＂（１９８３年 北京）来（２）用在动词后，表示动作的结果：examples 1-3 as above|看来今年超产没有问题｜想来你是早有准备的
汉语博大精深。"来"表示意愿和热情。。。。。。。。。。。。。。。。。。。。。。。。。。。。