could circumcise
Regular verb: circumcise - circumcised- circumcised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could circumcise
you could circumcise
he could circumcise
we could circumcise
you could circumcise
they could circumcise 	I could be circumcising
you could be circumcising
he could be circumcising
we could be circumcising
you could be circumcising
they could be circumcising	I could have circumcised
you could have circumcised
he could have circumcised
we could have circumcised
you could have circumcised
they could have circumcised	I could have been circumcising
you could have been circumcising
he could have been circumcising
we could have been circumcising
you could have been circumcising
they could have been circumcising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't circumcise
you couldn't circumcise
he couldn't circumcise
we couldn't circumcise
you couldn't circumcise
they couldn't circumcise 	I couldn't be circumcising
you couldn't be circumcising
he couldn't be circumcising
we couldn't be circumcising
you couldn't be circumcising
they couldn't be circumcising	I couldn't have circumcised
you couldn't have circumcised
he couldn't have circumcised
we couldn't have circumcised
you couldn't have circumcised
they couldn't have circumcised	I couldn't have been circumcising
you couldn't have been circumcising
he couldn't have been circumcising
we couldn't have been circumcising
you couldn't have been circumcising
they couldn't have been circumcising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I circumcise?
could you circumcise?
could he circumcise?
could we circumcise?
could you circumcise?
could they circumcise? 	could I be circumcising?
could you be circumcising?
could he be circumcising?
could we be circumcising?
could you be circumcising?
could they be circumcising? 	could I have circumcised?
could you have circumcised?
could he have circumcised?
could we have circumcised?
could you have circumcised?
could they have circumcised? 	could I have been circumcising?
could you have been circumcising?
could he have been circumcising?
could we have been circumcising?
could you have been circumcising?
could they have been circumcising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I circumcise?
couldn't you circumcise?
couldn't he circumcise?
couldn't we circumcise?
couldn't you circumcise?
couldn't they circumcise? 	couldn't I be circumcising?
couldn't you be circumcising?
couldn't he be circumcising?
couldn't we be circumcising?
couldn't you be circumcising?
couldn't they be circumcising? 	couldn't I have circumcised?
couldn't you have circumcised?
couldn't he have circumcised?
couldn't we have circumcised?
couldn't you have circumcised?
couldn't they have circumcised? 	couldn't I have been circumcising?
couldn't you have been circumcising?
couldn't he have been circumcising?
couldn't we have been circumcising?
couldn't you have been circumcising?
couldn't they have been circumcising?