could grammar
Regular verb: grammar - grammared- grammared

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

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could grammar
you could grammar
he could grammar
we could grammar
you could grammar
they could grammar 	I could be grammaring
you could be grammaring
he could be grammaring
we could be grammaring
you could be grammaring
they could be grammaring	I could have grammared
you could have grammared
he 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
he 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 	Perfect 	V-ing perfect 	
I could not grammar
you could not grammar
he could not grammar
we could not grammar
you could not grammar
they could not grammar 	I could not be grammaring
you could not be grammaring
he could not be grammaring
we could not be grammaring
you could not be grammaring
they could not be grammaring	I could not have grammared
you could not have grammared
he could not have grammared
we could not have grammared
you could not have grammared
they could not have grammared	I could not have been grammaring
you could not have been grammaring
he could not have been grammaring
we could not have been grammaring
you could not have been grammaring
they could not have been grammaring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I grammar?
could you grammar?
could he grammar?
could we grammar?
could you grammar?
could they grammar? 	could I be grammaring?
could you be grammaring?
could he be grammaring?
could we be grammaring?
could you be grammaring?
could they be grammaring? 	could I have grammared?
could you have grammared?
could he 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 he 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 	Perfect 	V-ing perfect 	
could I not grammar?
could you not grammar?
could he not grammar?
could we not grammar?
could you not grammar?
could they not grammar? 	could I not be grammaring?
could you not be grammaring?
could he not be grammaring?
could we not be grammaring?
could you not be grammaring?
could they not be grammaring? 	could I not have grammared?
could you not have grammared?
could he not have grammared?
could we not have grammared?
could you not have grammared?
could they not have grammared? 	could I not have been grammaring?
could you not have been grammaring?
could he not have been grammaring?
could we not have been grammaring?
could you not have been grammaring?
could they not have been grammaring?