can laugh
Regular verb: laugh - laughed- laughed

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