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: 
If you are following NPCR, I suggest you take a look at lesson 16 on book 2. You should first understand 我把照片带来了.

带 (carry) + 来 ("here") = 带来 (bring)

我把照片带来了。I brought the photo.

Compare:

我把照片带去了。I took the photo there.

带 (carry) + 去 ("there") = 带去 (take "there")

The translations "take/bring" to the word 带 don't quite express its real meaning. It doesn't show if you are taking something "here" or "there". These meanings are showed by the directional complements 来 and 去. Take a look at lesson 16's grammar.

The same thing is happening on 我把你们带到茶馆来, that is "carry here" (brought) to the tea house. 

Cheers
汉语博大精深。"来"表示意愿和热情。。。。。。。。。。。。。。。。。。。。。。。。。。。。