could subjoin
Verbo regular: subjoin - subjoined- subjoined

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could subjoin
you could subjoin
he could subjoin
we could subjoin
you could subjoin
they could subjoin 	I could be subjoining
you could be subjoining
he could be subjoining
we could be subjoining
you could be subjoining
they could be subjoining	I could have subjoined
you could have subjoined
he could have subjoined
we could have subjoined
you could have subjoined
they could have subjoined	I could have been subjoining
you could have been subjoining
he could have been subjoining
we could have been subjoining
you could have been subjoining
they could have been subjoining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't subjoin
you couldn't subjoin
he couldn't subjoin
we couldn't subjoin
you couldn't subjoin
they couldn't subjoin 	I couldn't be subjoining
you couldn't be subjoining
he couldn't be subjoining
we couldn't be subjoining
you couldn't be subjoining
they couldn't be subjoining	I couldn't have subjoined
you couldn't have subjoined
he couldn't have subjoined
we couldn't have subjoined
you couldn't have subjoined
they couldn't have subjoined	I couldn't have been subjoining
you couldn't have been subjoining
he couldn't have been subjoining
we couldn't have been subjoining
you couldn't have been subjoining
they couldn't have been subjoining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I subjoin?
could you subjoin?
could he subjoin?
could we subjoin?
could you subjoin?
could they subjoin? 	could I be subjoining?
could you be subjoining?
could he be subjoining?
could we be subjoining?
could you be subjoining?
could they be subjoining? 	could I have subjoined?
could you have subjoined?
could he have subjoined?
could we have subjoined?
could you have subjoined?
could they have subjoined? 	could I have been subjoining?
could you have been subjoining?
could he have been subjoining?
could we have been subjoining?
could you have been subjoining?
could they have been subjoining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I subjoin?
couldn't you subjoin?
couldn't he subjoin?
couldn't we subjoin?
couldn't you subjoin?
couldn't they subjoin? 	couldn't I be subjoining?
couldn't you be subjoining?
couldn't he be subjoining?
couldn't we be subjoining?
couldn't you be subjoining?
couldn't they be subjoining? 	couldn't I have subjoined?
couldn't you have subjoined?
couldn't he have subjoined?
couldn't we have subjoined?
couldn't you have subjoined?
couldn't they have subjoined? 	couldn't I have been subjoining?
couldn't you have been subjoining?
couldn't he have been subjoining?
couldn't we have been subjoining?
couldn't you have been subjoining?
couldn't they have been subjoining?