Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I should laughter you should laughter he should laughter we should laughter you should laughter they should laughter
V-ing form
I should be laughtering you should be laughtering he should be laughtering we should be laughtering you should be laughtering they should be laughtering
Perfect
I should have laughtered you should have laughtered he should have laughtered we should have laughtered you should have laughtered they should have laughtered
V-ing perfect
I should have been laughtering you should have been laughtering he should have been laughtering we should have been laughtering you should have been laughtering they should have been laughtering
Negation
Simple form
I should not laughter you should not laughter he should not laughter we should not laughter you should not laughter they should not laughter
V-ing form
I should not be laughtering you should not be laughtering he should not be laughtering we should not be laughtering you should not be laughtering they should not be laughtering
Perfect
I should not have laughtered you should not have laughtered he should not have laughtered we should not have laughtered you should not have laughtered they should not have laughtered
V-ing perfect
I should not have been laughtering you should not have been laughtering he should not have been laughtering we should not have been laughtering you should not have been laughtering they should not have been laughtering
Interrogative form
Simple form
should I laughter? should you laughter? should he laughter? should we laughter? should you laughter? should they laughter?
V-ing form
should I be laughtering? should you be laughtering? should he be laughtering? should we be laughtering? should you be laughtering? should they be laughtering?
Perfect
should I have laughtered? should you have laughtered? should he have laughtered? should we have laughtered? should you have laughtered? should they have laughtered?
V-ing perfect
should I have been laughtering? should you have been laughtering? should he have been laughtering? should we have been laughtering? should you have been laughtering? should they have been laughtering?
Interro-negative form
Simple form
should I not laughter? should you not laughter? should he not laughter? should we not laughter? should you not laughter? should they not laughter?
V-ing form
should I not be laughtering? should you not be laughtering? should he not be laughtering? should we not be laughtering? should you not be laughtering? should they not be laughtering?
Perfect
should I not have laughtered? should you not have laughtered? should he not have laughtered? should we not have laughtered? should you not have laughtered? should they not have laughtered?
V-ing perfect
should I not have been laughtering? should you not have been laughtering? should he not have been laughtering? should we not have been laughtering? should you not have been laughtering? should they not have been laughtering?