Pick the best word (or words) to fit in the blank/s.'How have you been recently, after those weeks when you were ill?''Oh, I ... ... grumble!'( Grumble = complain ; this is the phrase that some older people use when they think they have no right to feel sorry for themselves! )

The negative form is generally constructed by adding 'not'. The little word 'can't' is a negative modal auxiliary - its positive counterpart is 'can'.