I like the Joe Cocker version, but I swear I always thought he said something like, "I could give up for my friends"... I guess it was just the way he speeds into it... After I heard the Beatles version (which is after I heard the Cocker version!), it just stopped sounding right to me (the Cocker version, that is)...
And I'm sure the Beatles contributed a lot to the times' vocabulary. It'd be interesting to know what they could've contributed.