to jackknife
Regular verb: jackknife - jackknifed- jackknifed

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I do not jackknife
you do not jackknife
he doesnot jackknife
we do not jackknife
you do not jackknife
they do not jackknife 	Iamnot jackknifing
youarenot jackknifing
heisnot jackknifing
wearenot jackknifing
youarenot jackknifing
theyarenot jackknifing	I did not jackknife
you did not jackknife
he did not jackknife
we did not jackknife
you did not jackknife
they did not jackknife 	Iwasnot jackknifing
youwerenot jackknifing
hewasnot jackknifing
wewerenot jackknifing
youwerenot jackknifing
theywerenot jackknifing	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I have not jackknifed
you have not jackknifed
hehasnot jackknifed
we have not jackknifed
you have not jackknifed
they have not jackknifed	I have not  been jackknifing
you have not  been jackknifing
hehasnot  been jackknifing
we have not  been jackknifing
you have not  been jackknifing
they have not  been jackknifing	I had not jackknifed
you had not jackknifed
he had not jackknifed
we had not jackknifed
you had not jackknifed
they had not jackknifed	I had not been jackknifing
you had not been jackknifing
he had not been jackknifing
we had not been jackknifing
you had not been jackknifing
they had not been jackknifing	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I will not jackknife
you will not jackknife
he will not jackknife
we will not jackknife
you will not jackknife
they will not jackknife 	I will not be jackknifing
you will not be jackknifing
he will not be jackknifing
we will not be jackknifing
you will not be jackknifing
they will not be jackknifing	I will not have jackknifed
you will not have jackknifed
he will not have jackknifed
we will not have jackknifed
you will not have jackknifed
they will not have jackknifed	I will not have been jackknifing
you will not have been jackknifing
he will not have been jackknifing
we will not have been jackknifing
you will not have been jackknifing
they will not have been jackknifing	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I would not jackknife
you would not jackknife
he would not jackknife
we would not jackknife
you would not jackknife
they would not jackknife 	I would not be jackknifing
you would not be jackknifing
he would not be jackknifing
we would not be jackknifing
you would not be jackknifing
they would not be jackknifing	I would not have jackknifed
you would not have jackknifed
he would not have jackknifed
we would not have jackknifed
you would not have jackknifed
they would not have jackknifed	I would not have been jackknifing
you would not have been jackknifing
he would not have been jackknifing
we would not have been jackknifing
you would not have been jackknifing
they would not have been jackknifing	

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

Participle 	
Present 	Past 	 	 	
jackknifing	jackknifed