I do not stumble you do not stumble he does not stumble we do not stumble you do not stumble they do not stumble
Present continuous
I am not stumbling you are not stumbling he is not stumbling we are not stumbling you are not stumbling they are not stumbling
Preterite
I did not stumble you did not stumble he did not stumble we did not stumble you did not stumble they did not stumble
Preterite continuous
I was not stumbling you were not stumbling he was not stumbling we were not stumbling you were not stumbling they were not stumbling
Present perfect
I have not stumbled you have not stumbled he has not stumbled we have not stumbled you have not stumbled they have not stumbled
Present perfect continuous
I have not been stumbling you have not been stumbling he has not been stumbling we have not been stumbling you have not been stumbling they have not been stumbling
Pluperfect
I had not stumbled you had not stumbled he had not stumbled we had not stumbled you had not stumbled they had not stumbled
Pluperfect continuous
I had not been stumbling you had not been stumbling he had not been stumbling we had not been stumbling you had not been stumbling they had not been stumbling
Future
I will not stumble you will not stumble he will not stumble we will not stumble you will not stumble they will not stumble
Future continuous
I will not be stumbling you will not be stumbling he will not be stumbling we will not be stumbling you will not be stumbling they will not be stumbling
Future perfect
I will not have stumbled you will not have stumbled he will not have stumbled we will not have stumbled you will not have stumbled they will not have stumbled
Future perfect continuous
I will not have been stumbling you will not have been stumbling he will not have been stumbling we will not have been stumbling you will not have been stumbling they will not have been stumbling
Conditional
Present
I would not stumble you would not stumble he would not stumble we would not stumble you would not stumble they would not stumble
Present continuous
I would not be stumbling you would not be stumbling he would not be stumbling we would not be stumbling you would not be stumbling they would not be stumbling
Past
I would not have stumbled you would not have stumbled he would not have stumbled we would not have stumbled you would not have stumbled they would not have stumbled
Past continuous
I would not have been stumbling you would not have been stumbling he would not have been stumbling we would not have been stumbling you would not have been stumbling they would not have been stumbling