English verb conjugation
COULD CALM

Regular verb: calm - calmed - calmed

Affirmation

Simple form	V-ing form
I could calm you could calm she could calm we could calm you could calm they could calm	I could be calming you could be calming she could be calming we could be calming you could be calming they could be calming
Perfect	V-ing perfect
I could have calmed you could have calmed she could have calmed we could have calmed you could have calmed they could have calmed	I could have been calming you could have been calming she could have been calming we could have been calming you could have been calming they could have been calming

Negation

Simple form	V-ing form
I could not calm you could not calm she could not calm we could not calm you could not calm they could not calm	I could not be calming you could not be calming she could not be calming we could not be calming you could not be calming they could not be calming
Perfect	V-ing perfect
I could not have calmed you could not have calmed she could not have calmed we could not have calmed you could not have calmed they could not have calmed	I could not have been calming you could not have been calming she could not have been calming we could not have been calming you could not have been calming they could not have been calming

Interrogative form

Simple form	V-ing form
could I calm? could you calm? could she calm? could we calm? could you calm? could they calm?	could I be calming? could you be calming? could she be calming? could we be calming? could you be calming? could they be calming?
Perfect	V-ing perfect
could I have calmed? could you have calmed? could she have calmed? could we have calmed? could you have calmed? could they have calmed?	could I have been calming? could you have been calming? could she have been calming? could we have been calming? could you have been calming? could they have been calming?

Interro-negative form

Simple form	V-ing form
could I not calm? could you not calm? could she not calm? could we not calm? could you not calm? could they not calm?	could I not be calming? could you not be calming? could she not be calming? could we not be calming? could you not be calming? could they not be calming?
Perfect	V-ing perfect
could I not have calmed? could you not have calmed? could she not have calmed? could we not have calmed? could you not have calmed? could they not have calmed?	could I not have been calming? could you not have been calming? could she not have been calming? could we not have been calming? could you not have been calming? could they not have been calming?