English verb conjugation
COULD GRAMMAR

Regular verb: grammar - grammared - grammared

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could grammar you could grammar she could grammar we could grammar you could grammar they could grammar	I could be grammaring you could be grammaring she could be grammaring we could be grammaring you could be grammaring they could be grammaring
Perfect	V-ing perfect
I could have grammared you could have grammared she could have grammared we could have grammared you could have grammared they could have grammared	I could have been grammaring you could have been grammaring she could have been grammaring we could have been grammaring you could have been grammaring they could have been grammaring

Negation

Simple form	V-ing form
I couldn't grammar you couldn't grammar she couldn't grammar we couldn't grammar you couldn't grammar they couldn't grammar	I couldn't be grammaring you couldn't be grammaring she couldn't be grammaring we couldn't be grammaring you couldn't be grammaring they couldn't be grammaring
Perfect	V-ing perfect
I couldn't have grammared you couldn't have grammared she couldn't have grammared we couldn't have grammared you couldn't have grammared they couldn't have grammared	I couldn't have been grammaring you couldn't have been grammaring she couldn't have been grammaring we couldn't have been grammaring you couldn't have been grammaring they couldn't have been grammaring

Interrogative form

Simple form	V-ing form
could I grammar? could you grammar? could she grammar? could we grammar? could you grammar? could they grammar?	could I be grammaring? could you be grammaring? could she be grammaring? could we be grammaring? could you be grammaring? could they be grammaring?
Perfect	V-ing perfect
could I have grammared? could you have grammared? could she have grammared? could we have grammared? could you have grammared? could they have grammared?	could I have been grammaring? could you have been grammaring? could she have been grammaring? could we have been grammaring? could you have been grammaring? could they have been grammaring?

Interro-negative form

Simple form	V-ing form
couldn't I grammar? couldn't you grammar? couldn't she grammar? couldn't we grammar? couldn't you grammar? couldn't they grammar?	couldn't I be grammaring? couldn't you be grammaring? couldn't she be grammaring? couldn't we be grammaring? couldn't you be grammaring? couldn't they be grammaring?
Perfect	V-ing perfect
couldn't I have grammared? couldn't you have grammared? couldn't she have grammared? couldn't we have grammared? couldn't you have grammared? couldn't they have grammared?	couldn't I have been grammaring? couldn't you have been grammaring? couldn't she have been grammaring? couldn't we have been grammaring? couldn't you have been grammaring? couldn't they have been grammaring?