could interjoin
Regular verb: interjoin - interjoined- interjoined

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