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