to challenge
Regular verb: challenge - challenged- challenged

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I don't challenge
you don't challenge
he doesn't challenge
we don't challenge
you don't challenge
they don't challenge 	I'mnot challenging
youaren't challenging
heisn't challenging
wearen't challenging
youaren't challenging
theyaren't challenging	I didn't challenge
you didn't challenge
he didn't challenge
we didn't challenge
you didn't challenge
they didn't challenge 	Iwasn't challenging
youweren't challenging
hewasn't challenging
weweren't challenging
youweren't challenging
theyweren't challenging	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I haven't challenged
you haven't challenged
he hasn't challenged
we haven't challenged
you haven't challenged
they haven't challenged	I haven't  been challenging
you haven't  been challenging
he hasn't  been challenging
we haven't  been challenging
you haven't  been challenging
they haven't  been challenging	I hadn't challenged
you hadn't challenged
he hadn't challenged
we hadn't challenged
you hadn't challenged
they hadn't challenged	I hadn't been challenging
you hadn't been challenging
he hadn't been challenging
we hadn't been challenging
you hadn't been challenging
they hadn't been challenging	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I won't challenge
you won't challenge
he won't challenge
we won't challenge
you won't challenge
they won't challenge 	I won't be challenging
you won't be challenging
he won't be challenging
we won't be challenging
you won't be challenging
they won't be challenging	I won't have challenged
you won't have challenged
he won't have challenged
we won't have challenged
you won't have challenged
they won't have challenged	I won't have been challenging
you won't have been challenging
he won't have been challenging
we won't have been challenging
you won't have been challenging
they won't have been challenging	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I wouldn't challenge
you wouldn't challenge
he wouldn't challenge
we wouldn't challenge
you wouldn't challenge
they wouldn't challenge 	I wouldn't be challenging
you wouldn't be challenging
he wouldn't be challenging
we wouldn't be challenging
you wouldn't be challenging
they wouldn't be challenging	I wouldn't have challenged
you wouldn't have challenged
he wouldn't have challenged
we wouldn't have challenged
you wouldn't have challenged
they wouldn't have challenged	I wouldn't have been challenging
you wouldn't have been challenging
he wouldn't have been challenging
we wouldn't have been challenging
you wouldn't have been challenging
they wouldn't have been challenging	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to challenge 	 	do not challenge
Let's not challenge
do not challenge 	 	

Participle 	
Present 	Past 	 	 	
challenging	challenged