could conjoin
Regular verb: conjoin - conjoined- conjoined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could conjoin
you could conjoin
she could conjoin
we could conjoin
you could conjoin
they could conjoin 	I could be conjoining
you could be conjoining
she could be conjoining
we could be conjoining
you could be conjoining
they could be conjoining	I could have conjoined
you could have conjoined
she could have conjoined
we could have conjoined
you could have conjoined
they could have conjoined	I could have been conjoining
you could have been conjoining
she could have been conjoining
we could have been conjoining
you could have been conjoining
they could have been conjoining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't conjoin
you couldn't conjoin
she couldn't conjoin
we couldn't conjoin
you couldn't conjoin
they couldn't conjoin 	I couldn't be conjoining
you couldn't be conjoining
she couldn't be conjoining
we couldn't be conjoining
you couldn't be conjoining
they couldn't be conjoining	I couldn't have conjoined
you couldn't have conjoined
she couldn't have conjoined
we couldn't have conjoined
you couldn't have conjoined
they couldn't have conjoined	I couldn't have been conjoining
you couldn't have been conjoining
she couldn't have been conjoining
we couldn't have been conjoining
you couldn't have been conjoining
they couldn't have been conjoining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I conjoin?
could you conjoin?
could she conjoin?
could we conjoin?
could you conjoin?
could they conjoin? 	could I be conjoining?
could you be conjoining?
could she be conjoining?
could we be conjoining?
could you be conjoining?
could they be conjoining? 	could I have conjoined?
could you have conjoined?
could she have conjoined?
could we have conjoined?
could you have conjoined?
could they have conjoined? 	could I have been conjoining?
could you have been conjoining?
could she have been conjoining?
could we have been conjoining?
could you have been conjoining?
could they have been conjoining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I conjoin?
couldn't you conjoin?
couldn't she conjoin?
couldn't we conjoin?
couldn't you conjoin?
couldn't they conjoin? 	couldn't I be conjoining?
couldn't you be conjoining?
couldn't she be conjoining?
couldn't we be conjoining?
couldn't you be conjoining?
couldn't they be conjoining? 	couldn't I have conjoined?
couldn't you have conjoined?
couldn't she have conjoined?
couldn't we have conjoined?
couldn't you have conjoined?
couldn't they have conjoined? 	couldn't I have been conjoining?
couldn't you have been conjoining?
couldn't she have been conjoining?
couldn't we have been conjoining?
couldn't you have been conjoining?
couldn't they have been conjoining?