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