English verb conjugation
COULD HARSHEN

Regular verb: harshen - harshened - harshened

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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