English verb conjugation
CAN LAUGH

Regular verb: laugh - laughed - laughed

Affirmation

Simple form	V-ing form
I can laugh you can laugh he can laugh we can laugh you can laugh they can laugh	I can be laughing you can be laughing he can be laughing we can be laughing you can be laughing they can be laughing
Perfect	V-ing perfect
I can have laughed you can have laughed he can have laughed we can have laughed you can have laughed they can have laughed	I can have been laughing you can have been laughing he can have been laughing we can have been laughing you can have been laughing they can have been laughing

Negation

Simple form	V-ing form
I can't laugh you can't laugh he can't laugh we can't laugh you can't laugh they can't laugh	I can't be laughing you can't be laughing he can't be laughing we can't be laughing you can't be laughing they can't be laughing
Perfect	V-ing perfect
I can't have laughed you can't have laughed he can't have laughed we can't have laughed you can't have laughed they can't have laughed	I can't have been laughing you can't have been laughing he can't have been laughing we can't have been laughing you can't have been laughing they can't have been laughing

Interrogative form

Simple form	V-ing form
can I laugh? can you laugh? can he laugh? can we laugh? can you laugh? can they laugh?	can I be laughing? can you be laughing? can he be laughing? can we be laughing? can you be laughing? can they be laughing?
Perfect	V-ing perfect
can I have laughed? can you have laughed? can he have laughed? can we have laughed? can you have laughed? can they have laughed?	can I have been laughing? can you have been laughing? can he have been laughing? can we have been laughing? can you have been laughing? can they have been laughing?

Interro-negative form

Simple form	V-ing form
can't I laugh? can't you laugh? can't he laugh? can't we laugh? can't you laugh? can't they laugh?	can't I be laughing? can't you be laughing? can't he be laughing? can't we be laughing? can't you be laughing? can't they be laughing?
Perfect	V-ing perfect
can't I have laughed? can't you have laughed? can't he have laughed? can't we have laughed? can't you have laughed? can't they have laughed?	can't I have been laughing? can't you have been laughing? can't he have been laughing? can't we have been laughing? can't you have been laughing? can't they have been laughing?