I have always seen these analyzed as a kind of result clause; the  
infinitive functioning as a complement to the adjective.

Kathleen Ward
UC Davis
On Apr 22, 2008, at 5:08 AM, Peter Adams wrote:
> I'm wondering if someone on the list could help me with the  
> analysis of the following:
>
> He was too drunk to drive.
>
> What is the function of the infinitive "to drive"?
>
> Peter Adams
>
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