I do not challenge you do not challenge he does not challenge we do not challenge you do not challenge they do not challenge
Present continuous
I am not challenging you are not challenging he is not challenging we are not challenging you are not challenging they are not challenging
Preterite
I did not challenge you did not challenge he did not challenge we did not challenge you did not challenge they did not challenge
Preterite continuous
I was not challenging you were not challenging he was not challenging we were not challenging you were not challenging they were not challenging
Present perfect
I have not challenged you have not challenged he has not challenged we have not challenged you have not challenged they have not challenged
Present perfect continuous
I have not been challenging you have not been challenging he has not been challenging we have not been challenging you have not been challenging they have not been challenging
Pluperfect
I had not challenged you had not challenged he had not challenged we had not challenged you had not challenged they had not challenged
Pluperfect continuous
I had not been challenging you had not been challenging he had not been challenging we had not been challenging you had not been challenging they had not been challenging
Future
I will not challenge you will not challenge he will not challenge we will not challenge you will not challenge they will not challenge
Future continuous
I will not be challenging you will not be challenging he will not be challenging we will not be challenging you will not be challenging they will not be challenging
Future perfect
I will not have challenged you will not have challenged he will not have challenged we will not have challenged you will not have challenged they will not have challenged
Future perfect continuous
I will not have been challenging you will not have been challenging he will not have been challenging we will not have been challenging you will not have been challenging they will not have been challenging
Conditional
Present
I would not challenge you would not challenge he would not challenge we would not challenge you would not challenge they would not challenge
Present continuous
I would not be challenging you would not be challenging he would not be challenging we would not be challenging you would not be challenging they would not be challenging
Past
I would not have challenged you would not have challenged he would not have challenged we would not have challenged you would not have challenged they would not have challenged
Past continuous
I would not have been challenging you would not have been challenging he would not have been challenging we would not have been challenging you would not have been challenging they would not have been challenging
Imperative
Imperative
do not challenge Let's not challenge do not challenge