English verb conjugation
CAN UNDERSTOCK

Regular verb: understock - understocked - understocked

Affirmation

Simple form	V-ing form
I can understock you can understock he can understock we can understock you can understock they can understock	I can be understocking you can be understocking he can be understocking we can be understocking you can be understocking they can be understocking
Perfect	V-ing perfect
I can have understocked you can have understocked he can have understocked we can have understocked you can have understocked they can have understocked	I can have been understocking you can have been understocking he can have been understocking we can have been understocking you can have been understocking they can have been understocking

Negation

Simple form	V-ing form
I cannot understock you cannot understock he cannot understock we cannot understock you cannot understock they cannot understock	I cannot be understocking you cannot be understocking he cannot be understocking we cannot be understocking you cannot be understocking they cannot be understocking
Perfect	V-ing perfect
I cannot have understocked you cannot have understocked he cannot have understocked we cannot have understocked you cannot have understocked they cannot have understocked	I cannot have been understocking you cannot have been understocking he cannot have been understocking we cannot have been understocking you cannot have been understocking they cannot have been understocking

Interrogative form

Simple form	V-ing form
can I understock? can you understock? can he understock? can we understock? can you understock? can they understock?	can I be understocking? can you be understocking? can he be understocking? can we be understocking? can you be understocking? can they be understocking?
Perfect	V-ing perfect
can I have understocked? can you have understocked? can he have understocked? can we have understocked? can you have understocked? can they have understocked?	can I have been understocking? can you have been understocking? can he have been understocking? can we have been understocking? can you have been understocking? can they have been understocking?

Interro-negative form

Simple form	V-ing form
can I not understock? can you not understock? can he not understock? can we not understock? can you not understock? can they not understock?	can I not be understocking? can you not be understocking? can he not be understocking? can we not be understocking? can you not be understocking? can they not be understocking?
Perfect	V-ing perfect
can I not have understocked? can you not have understocked? can he not have understocked? can we not have understocked? can you not have understocked? can they not have understocked?	can I not have been understocking? can you not have been understocking? can he not have been understocking? can we not have been understocking? can you not have been understocking? can they not have been understocking?