English verb conjugation
CAN HARSHEN

Regular verb: harshen - harshened - harshened

Affirmation

Simple form	V-ing form
I can harshen you can harshen he can harshen we can harshen you can harshen they can harshen	I can be harshening you can be harshening he can be harshening we can be harshening you can be harshening they can be harshening
Perfect	V-ing perfect
I can have harshened you can have harshened he can have harshened we can have harshened you can have harshened they can have harshened	I can have been harshening you can have been harshening he can have been harshening we can have been harshening you can have been harshening they can have been harshening

Negation

Simple form	V-ing form
I cannot harshen you cannot harshen he cannot harshen we cannot harshen you cannot harshen they cannot harshen	I cannot be harshening you cannot be harshening he cannot be harshening we cannot be harshening you cannot be harshening they cannot be harshening
Perfect	V-ing perfect
I cannot have harshened you cannot have harshened he cannot have harshened we cannot have harshened you cannot have harshened they cannot have harshened	I cannot have been harshening you cannot have been harshening he cannot have been harshening we cannot have been harshening you cannot have been harshening they cannot have been harshening

Interrogative form

Simple form	V-ing form
can I harshen? can you harshen? can he harshen? can we harshen? can you harshen? can they harshen?	can I be harshening? can you be harshening? can he be harshening? can we be harshening? can you be harshening? can they be harshening?
Perfect	V-ing perfect
can I have harshened? can you have harshened? can he have harshened? can we have harshened? can you have harshened? can they have harshened?	can I have been harshening? can you have been harshening? can he have been harshening? can we have been harshening? can you have been harshening? can they have been harshening?

Interro-negative form

Simple form	V-ing form
can I not harshen? can you not harshen? can he not harshen? can we not harshen? can you not harshen? can they not harshen?	can I not be harshening? can you not be harshening? can he not be harshening? can we not be harshening? can you not be harshening? can they not be harshening?
Perfect	V-ing perfect
can I not have harshened? can you not have harshened? can he not have harshened? can we not have harshened? can you not have harshened? can they not have harshened?	can I not have been harshening? can you not have been harshening? can he not have been harshening? can we not have been harshening? can you not have been harshening? can they not have been harshening?