English verb conjugation CAN SHARPEN

Regular verb: sharpen - sharpened - sharpened

Affirmation

Simple form

I can sharpen
you can sharpen
he can sharpen
we can sharpen
you can sharpen
they can sharpen

V-ing form

I can be sharpening
you can be sharpening
he can be sharpening
we can be sharpening
you can be sharpening
they can be sharpening

Perfect

I can have sharpened
you can have sharpened
he can have sharpened
we can have sharpened
you can have sharpened
they can have sharpened

V-ing perfect

I can have been sharpening
you can have been sharpening
he can have been sharpening
we can have been sharpening
you can have been sharpening
they can have been sharpening

Negation

Simple form

I cannot sharpen
you cannot sharpen
he cannot sharpen
we cannot sharpen
you cannot sharpen
they cannot sharpen

V-ing form

I cannot be sharpening
you cannot be sharpening
he cannot be sharpening
we cannot be sharpening
you cannot be sharpening
they cannot be sharpening

Perfect

I cannot have sharpened
you cannot have sharpened
he cannot have sharpened
we cannot have sharpened
you cannot have sharpened
they cannot have sharpened

V-ing perfect

I cannot have been sharpening
you cannot have been sharpening
he cannot have been sharpening
we cannot have been sharpening
you cannot have been sharpening
they cannot have been sharpening

Interrogative form

Simple form

can I sharpen?
can you sharpen?
can he sharpen?
can we sharpen?
can you sharpen?
can they sharpen?

V-ing form

can I be sharpening?
can you be sharpening?
can he be sharpening?
can we be sharpening?
can you be sharpening?
can they be sharpening?

Perfect

can I have sharpened?
can you have sharpened?
can he have sharpened?
can we have sharpened?
can you have sharpened?
can they have sharpened?

V-ing perfect

can I have been sharpening?
can you have been sharpening?
can he have been sharpening?
can we have been sharpening?
can you have been sharpening?
can they have been sharpening?

Interro-negative form

Simple form

can I not sharpen?
can you not sharpen?
can he not sharpen?
can we not sharpen?
can you not sharpen?
can they not sharpen?

V-ing form

can I not be sharpening?
can you not be sharpening?
can he not be sharpening?
can we not be sharpening?
can you not be sharpening?
can they not be sharpening?

Perfect

can I not have sharpened?
can you not have sharpened?
can he not have sharpened?
can we not have sharpened?
can you not have sharpened?
can they not have sharpened?

V-ing perfect

can I not have been sharpening?
can you not have been sharpening?
can he not have been sharpening?
can we not have been sharpening?
can you not have been sharpening?
can they not have been sharpening?

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