do be do be do

My French lecturer recently said that every language needs teh verbs be and
have.

I quickly disillusioned him, but I was wondering about teh verb 'do'. How
essential is it? AN ddoes its essentiallity change in languages which make
do without be or have?

---
Fabian
Rule One: Question the unquestionable,
ask the unaskable, eff the ineffable,
think the unthinkable, and screw the inscrutable.