Meaning and grammar help

[xrac00]

"あなたの本を車の中に置いてきてしまいました。" means "I left your book in the car." but what is the meaning of "きて" and "しまいました" in context of the sentence?

 

[Half-n-Half]

きて ＝ 来て ＝ to come
In this context, しまう is used to say the speaker accidentally left the book in the car.

 

[xrac00]

Ah, Ok. So how does 来て (to come) relate to the sentence? Who or what is actually coming?

 

[Mike Cash]

The person who left the book.

In English the notion of going/coming away from an object is inherent in the word "leave"; you can't "leave" something somewhere without separating yourself from it.

The Japanese has it split into two verbs: 置く and either 行く or 来る.