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  5. "Tu as été d'une grande aide."

"Tu as été d'une grande aide."

Translation:You have been a great help.

February 13, 2013

2 Comments


https://www.duolingo.com/profile/beckydale

English translation can also be: "You have been a big help"


https://www.duolingo.com/profile/zk89

What's the purpose of the de in this sentence?

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