Opposite of constructions using 得 (must / have to) What is the correct way to form a sentence expressing the opposite of 得 (have to) as in "to not have to".  I don't think 不得 is correct?! 


  *我不得工作


I am thinking something like...


  我不需要工作 or
  我不用工作


Is there a better way to construct "do not have to?".
You are correct in that 不得 is not the correct negation for 得 (děi). The generally recognized negation for 得 is 不必 (bùbì), although 不需要 (bùxūyào) and 不用 (bùyòng) are perfectly fine as well; you could also use 无须 (wúxū).