can subjoin
Regular verb: subjoin - subjoined- subjoined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can subjoin
you can subjoin
she can subjoin
we can subjoin
you can subjoin
they can subjoin 	I can be subjoining
you can be subjoining
she can be subjoining
we can be subjoining
you can be subjoining
they can be subjoining	I can have subjoined
you can have subjoined
she can have subjoined
we can have subjoined
you can have subjoined
they can have subjoined	I can have been subjoining
you can have been subjoining
she can have been subjoining
we can have been subjoining
you can have been subjoining
they can have been subjoining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't subjoin
you can't subjoin
she can't subjoin
we can't subjoin
you can't subjoin
they can't subjoin 	I can't be subjoining
you can't be subjoining
she can't be subjoining
we can't be subjoining
you can't be subjoining
they can't be subjoining	I can't have subjoined
you can't have subjoined
she can't have subjoined
we can't have subjoined
you can't have subjoined
they can't have subjoined	I can't have been subjoining
you can't have been subjoining
she can't have been subjoining
we can't have been subjoining
you can't have been subjoining
they can't have been subjoining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I subjoin?
can you subjoin?
can she subjoin?
can we subjoin?
can you subjoin?
can they subjoin? 	can I be subjoining?
can you be subjoining?
can she be subjoining?
can we be subjoining?
can you be subjoining?
can they be subjoining? 	can I have subjoined?
can you have subjoined?
can she have subjoined?
can we have subjoined?
can you have subjoined?
can they have subjoined? 	can I have been subjoining?
can you have been subjoining?
can she have been subjoining?
can we have been subjoining?
can you have been subjoining?
can they have been subjoining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I subjoin?
can't you subjoin?
can't she subjoin?
can't we subjoin?
can't you subjoin?
can't they subjoin? 	can't I be subjoining?
can't you be subjoining?
can't she be subjoining?
can't we be subjoining?
can't you be subjoining?
can't they be subjoining? 	can't I have subjoined?
can't you have subjoined?
can't she have subjoined?
can't we have subjoined?
can't you have subjoined?
can't they have subjoined? 	can't I have been subjoining?
can't you have been subjoining?
can't she have been subjoining?
can't we have been subjoining?
can't you have been subjoining?
can't they have been subjoining?