can overstock
Regular verb: overstock - overstocked- overstocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can overstock
you can overstock
he can overstock
we can overstock
you can overstock
they can overstock 	I can be overstocking
you can be overstocking
he can be overstocking
we can be overstocking
you can be overstocking
they can be overstocking	I can have overstocked
you can have overstocked
he can have overstocked
we can have overstocked
you can have overstocked
they can have overstocked	I can have been overstocking
you can have been overstocking
he can have been overstocking
we can have been overstocking
you can have been overstocking
they can have been overstocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't overstock
you can't overstock
he can't overstock
we can't overstock
you can't overstock
they can't overstock 	I can't be overstocking
you can't be overstocking
he can't be overstocking
we can't be overstocking
you can't be overstocking
they can't be overstocking	I can't have overstocked
you can't have overstocked
he can't have overstocked
we can't have overstocked
you can't have overstocked
they can't have overstocked	I can't have been overstocking
you can't have been overstocking
he can't have been overstocking
we can't have been overstocking
you can't have been overstocking
they can't have been overstocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I overstock?
can you overstock?
can he overstock?
can we overstock?
can you overstock?
can they overstock? 	can I be overstocking?
can you be overstocking?
can he be overstocking?
can we be overstocking?
can you be overstocking?
can they be overstocking? 	can I have overstocked?
can you have overstocked?
can he have overstocked?
can we have overstocked?
can you have overstocked?
can they have overstocked? 	can I have been overstocking?
can you have been overstocking?
can he have been overstocking?
can we have been overstocking?
can you have been overstocking?
can they have been overstocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I overstock?
can't you overstock?
can't he overstock?
can't we overstock?
can't you overstock?
can't they overstock? 	can't I be overstocking?
can't you be overstocking?
can't he be overstocking?
can't we be overstocking?
can't you be overstocking?
can't they be overstocking? 	can't I have overstocked?
can't you have overstocked?
can't he have overstocked?
can't we have overstocked?
can't you have overstocked?
can't they have overstocked? 	can't I have been overstocking?
can't you have been overstocking?
can't he have been overstocking?
can't we have been overstocking?
can't you have been overstocking?
can't they have been overstocking?