could amputate
Regular verb: amputate - amputated- amputated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could amputate
you could amputate
she could amputate
we could amputate
you could amputate
they could amputate 	I could be amputating
you could be amputating
she could be amputating
we could be amputating
you could be amputating
they could be amputating	I could have amputated
you could have amputated
she could have amputated
we could have amputated
you could have amputated
they could have amputated	I could have been amputating
you could have been amputating
she could have been amputating
we could have been amputating
you could have been amputating
they could have been amputating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't amputate
you couldn't amputate
she couldn't amputate
we couldn't amputate
you couldn't amputate
they couldn't amputate 	I couldn't be amputating
you couldn't be amputating
she couldn't be amputating
we couldn't be amputating
you couldn't be amputating
they couldn't be amputating	I couldn't have amputated
you couldn't have amputated
she couldn't have amputated
we couldn't have amputated
you couldn't have amputated
they couldn't have amputated	I couldn't have been amputating
you couldn't have been amputating
she couldn't have been amputating
we couldn't have been amputating
you couldn't have been amputating
they couldn't have been amputating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I amputate?
could you amputate?
could she amputate?
could we amputate?
could you amputate?
could they amputate? 	could I be amputating?
could you be amputating?
could she be amputating?
could we be amputating?
could you be amputating?
could they be amputating? 	could I have amputated?
could you have amputated?
could she have amputated?
could we have amputated?
could you have amputated?
could they have amputated? 	could I have been amputating?
could you have been amputating?
could she have been amputating?
could we have been amputating?
could you have been amputating?
could they have been amputating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I amputate?
couldn't you amputate?
couldn't she amputate?
couldn't we amputate?
couldn't you amputate?
couldn't they amputate? 	couldn't I be amputating?
couldn't you be amputating?
couldn't she be amputating?
couldn't we be amputating?
couldn't you be amputating?
couldn't they be amputating? 	couldn't I have amputated?
couldn't you have amputated?
couldn't she have amputated?
couldn't we have amputated?
couldn't you have amputated?
couldn't they have amputated? 	couldn't I have been amputating?
couldn't you have been amputating?
couldn't she have been amputating?
couldn't we have been amputating?
couldn't you have been amputating?
couldn't they have been amputating?