could interjoin
Regular verb: interjoin - interjoined- interjoined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could interjoin
you could interjoin
she could interjoin
we could interjoin
you could interjoin
they could interjoin 	I could be interjoining
you could be interjoining
she could be interjoining
we could be interjoining
you could be interjoining
they could be interjoining	I could have interjoined
you could have interjoined
she could have interjoined
we could have interjoined
you could have interjoined
they could have interjoined	I could have been interjoining
you could have been interjoining
she could have been interjoining
we could have been interjoining
you could have been interjoining
they could have been interjoining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not interjoin
you could not interjoin
she could not interjoin
we could not interjoin
you could not interjoin
they could not interjoin 	I could not be interjoining
you could not be interjoining
she could not be interjoining
we could not be interjoining
you could not be interjoining
they could not be interjoining	I could not have interjoined
you could not have interjoined
she could not have interjoined
we could not have interjoined
you could not have interjoined
they could not have interjoined	I could not have been interjoining
you could not have been interjoining
she could not have been interjoining
we could not have been interjoining
you could not have been interjoining
they could not have been interjoining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I interjoin?
could you interjoin?
could she interjoin?
could we interjoin?
could you interjoin?
could they interjoin? 	could I be interjoining?
could you be interjoining?
could she be interjoining?
could we be interjoining?
could you be interjoining?
could they be interjoining? 	could I have interjoined?
could you have interjoined?
could she have interjoined?
could we have interjoined?
could you have interjoined?
could they have interjoined? 	could I have been interjoining?
could you have been interjoining?
could she have been interjoining?
could we have been interjoining?
could you have been interjoining?
could they have been interjoining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not interjoin?
could you not interjoin?
could she not interjoin?
could we not interjoin?
could you not interjoin?
could they not interjoin? 	could I not be interjoining?
could you not be interjoining?
could she not be interjoining?
could we not be interjoining?
could you not be interjoining?
could they not be interjoining? 	could I not have interjoined?
could you not have interjoined?
could she not have interjoined?
could we not have interjoined?
could you not have interjoined?
could they not have interjoined? 	could I not have been interjoining?
could you not have been interjoining?
could she not have been interjoining?
could we not have been interjoining?
could you not have been interjoining?
could they not have been interjoining?