Warning, this verb may not exist. Conjugation is given as example.
Indicative
Present
I do not lengthen lengthen you do not lengthen lengthen he does not lengthen lengthen we do not lengthen lengthen you do not lengthen lengthen they do not lengthen lengthen
Present continuous
I am not lengthen lengthening you are not lengthen lengthening he is not lengthen lengthening we are not lengthen lengthening you are not lengthen lengthening they are not lengthen lengthening
Preterite
I did not lengthen lengthen you did not lengthen lengthen he did not lengthen lengthen we did not lengthen lengthen you did not lengthen lengthen they did not lengthen lengthen
Preterite continuous
I was not lengthen lengthening you were not lengthen lengthening he was not lengthen lengthening we were not lengthen lengthening you were not lengthen lengthening they were not lengthen lengthening
Present perfect
I have not lengthen lengthened you have not lengthen lengthened he has not lengthen lengthened we have not lengthen lengthened you have not lengthen lengthened they have not lengthen lengthened
Present perfect continuous
I have not been lengthen lengthening you have not been lengthen lengthening he has not been lengthen lengthening we have not been lengthen lengthening you have not been lengthen lengthening they have not been lengthen lengthening
Pluperfect
I had not lengthen lengthened you had not lengthen lengthened he had not lengthen lengthened we had not lengthen lengthened you had not lengthen lengthened they had not lengthen lengthened
Pluperfect continuous
I had not been lengthen lengthening you had not been lengthen lengthening he had not been lengthen lengthening we had not been lengthen lengthening you had not been lengthen lengthening they had not been lengthen lengthening
Future
I will not lengthen lengthen you will not lengthen lengthen he will not lengthen lengthen we will not lengthen lengthen you will not lengthen lengthen they will not lengthen lengthen
Future continuous
I will not be lengthen lengthening you will not be lengthen lengthening he will not be lengthen lengthening we will not be lengthen lengthening you will not be lengthen lengthening they will not be lengthen lengthening
Future perfect
I will not have lengthen lengthened you will not have lengthen lengthened he will not have lengthen lengthened we will not have lengthen lengthened you will not have lengthen lengthened they will not have lengthen lengthened
Future perfect continuous
I will not have been lengthen lengthening you will not have been lengthen lengthening he will not have been lengthen lengthening we will not have been lengthen lengthening you will not have been lengthen lengthening they will not have been lengthen lengthening
Conditional
Present
I would not lengthen lengthen you would not lengthen lengthen he would not lengthen lengthen we would not lengthen lengthen you would not lengthen lengthen they would not lengthen lengthen
Present continuous
I would not be lengthen lengthening you would not be lengthen lengthening he would not be lengthen lengthening we would not be lengthen lengthening you would not be lengthen lengthening they would not be lengthen lengthening
Past
I would not have lengthen lengthened you would not have lengthen lengthened he would not have lengthen lengthened we would not have lengthen lengthened you would not have lengthen lengthened they would not have lengthen lengthened
Past continuous
I would not have been lengthen lengthening you would not have been lengthen lengthening he would not have been lengthen lengthening we would not have been lengthen lengthening you would not have been lengthen lengthening they would not have been lengthen lengthening
Imperative
Imperative
do not lengthen lengthen Let's not lengthen lengthen do not lengthen lengthen