When did Snape invent his curses?

[Marisa Crosset]

No: HPFGUIDX 133872

Ali:
<SNIP>

> I read this portion of the book and wondered if spell-working 
was not
> similar to languages.  
<SNIP>
 What if, like languages, 
after a
> while, people develop an instinct for what's right
<SNIP>
> With five years of practice, it isn't unreasonable, then, to 
assume
> that the kids have picked up the necessary instincts, especially
> Harry, what with his many adventures and all.


In support of Ali's point, in the graveyard scene in GOF, Harry 
merely points his wand and yells, "Accio!" to summon the portkey 
to return to Hogwarts (as opposed to "Accio portkey" or 
whatever). Think that at this point the intention is much more 
powerful than the actual words or wrist movements.

Did anyone else wonder why Harry didn't try a non-verbal spell 
when up on the rooftop with DD and Malfoy?

Marisa