TA's second reply:
no problem, lips sealed. i do not expect you to do your partner's
work
throughout the project...if his behavior continues please alert
me
immediately 
do not be afraid to vocalize your frustrations to him. remember, if
you
confront him in an aggressive manor he will be defensive regardless
of
his prior actions.
i am upstairs in siebel if you guys need to talk with me.
matthew