can cachinnate
Regular verb: cachinnate - cachinnated- cachinnated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can cachinnate
you can cachinnate
he can cachinnate
we can cachinnate
you can cachinnate
they can cachinnate 	I can be cachinnating
you can be cachinnating
he can be cachinnating
we can be cachinnating
you can be cachinnating
they can be cachinnating	I can have cachinnated
you can have cachinnated
he can have cachinnated
we can have cachinnated
you can have cachinnated
they can have cachinnated	I can have been cachinnating
you can have been cachinnating
he can have been cachinnating
we can have been cachinnating
you can have been cachinnating
they can have been cachinnating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't cachinnate
you can't cachinnate
he can't cachinnate
we can't cachinnate
you can't cachinnate
they can't cachinnate 	I can't be cachinnating
you can't be cachinnating
he can't be cachinnating
we can't be cachinnating
you can't be cachinnating
they can't be cachinnating	I can't have cachinnated
you can't have cachinnated
he can't have cachinnated
we can't have cachinnated
you can't have cachinnated
they can't have cachinnated	I can't have been cachinnating
you can't have been cachinnating
he can't have been cachinnating
we can't have been cachinnating
you can't have been cachinnating
they can't have been cachinnating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I cachinnate?
can you cachinnate?
can he cachinnate?
can we cachinnate?
can you cachinnate?
can they cachinnate? 	can I be cachinnating?
can you be cachinnating?
can he be cachinnating?
can we be cachinnating?
can you be cachinnating?
can they be cachinnating? 	can I have cachinnated?
can you have cachinnated?
can he have cachinnated?
can we have cachinnated?
can you have cachinnated?
can they have cachinnated? 	can I have been cachinnating?
can you have been cachinnating?
can he have been cachinnating?
can we have been cachinnating?
can you have been cachinnating?
can they have been cachinnating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I cachinnate?
can't you cachinnate?
can't he cachinnate?
can't we cachinnate?
can't you cachinnate?
can't they cachinnate? 	can't I be cachinnating?
can't you be cachinnating?
can't he be cachinnating?
can't we be cachinnating?
can't you be cachinnating?
can't they be cachinnating? 	can't I have cachinnated?
can't you have cachinnated?
can't he have cachinnated?
can't we have cachinnated?
can't you have cachinnated?
can't they have cachinnated? 	can't I have been cachinnating?
can't you have been cachinnating?
can't he have been cachinnating?
can't we have been cachinnating?
can't you have been cachinnating?
can't they have been cachinnating?