English verb conjugation
CAN CALCULATE

Regular verb: calculate - calculated - calculated

Affirmation

Simple form	V-ing form
I can calculate you can calculate he can calculate we can calculate you can calculate they can calculate	I can be calculating you can be calculating he can be calculating we can be calculating you can be calculating they can be calculating
Perfect	V-ing perfect
I can have calculated you can have calculated he can have calculated we can have calculated you can have calculated they can have calculated	I can have been calculating you can have been calculating he can have been calculating we can have been calculating you can have been calculating they can have been calculating

Negation

Simple form	V-ing form
I cannot calculate you cannot calculate he cannot calculate we cannot calculate you cannot calculate they cannot calculate	I cannot be calculating you cannot be calculating he cannot be calculating we cannot be calculating you cannot be calculating they cannot be calculating
Perfect	V-ing perfect
I cannot have calculated you cannot have calculated he cannot have calculated we cannot have calculated you cannot have calculated they cannot have calculated	I cannot have been calculating you cannot have been calculating he cannot have been calculating we cannot have been calculating you cannot have been calculating they cannot have been calculating

Interrogative form

Simple form	V-ing form
can I calculate? can you calculate? can he calculate? can we calculate? can you calculate? can they calculate?	can I be calculating? can you be calculating? can he be calculating? can we be calculating? can you be calculating? can they be calculating?
Perfect	V-ing perfect
can I have calculated? can you have calculated? can he have calculated? can we have calculated? can you have calculated? can they have calculated?	can I have been calculating? can you have been calculating? can he have been calculating? can we have been calculating? can you have been calculating? can they have been calculating?

Interro-negative form

Simple form	V-ing form
can I not calculate? can you not calculate? can he not calculate? can we not calculate? can you not calculate? can they not calculate?	can I not be calculating? can you not be calculating? can he not be calculating? can we not be calculating? can you not be calculating? can they not be calculating?
Perfect	V-ing perfect
can I not have calculated? can you not have calculated? can he not have calculated? can we not have calculated? can you not have calculated? can they not have calculated?	can I not have been calculating? can you not have been calculating? can he not have been calculating? can we not have been calculating? can you not have been calculating? can they not have been calculating?