can 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 can grammar
you can grammar
she can grammar
we can grammar
you can grammar
they can grammar 	I can be grammaring
you can be grammaring
she can be grammaring
we can be grammaring
you can be grammaring
they can be grammaring	I can have grammared
you can have grammared
she can have grammared
we can have grammared
you can have grammared
they can have grammared	I can have been grammaring
you can have been grammaring
she can have been grammaring
we can have been grammaring
you can have been grammaring
they can have been grammaring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot grammar
you cannot grammar
she cannot grammar
we cannot grammar
you cannot grammar
they cannot grammar 	I cannot be grammaring
you cannot be grammaring
she cannot be grammaring
we cannot be grammaring
you cannot be grammaring
they cannot be grammaring	I cannot have grammared
you cannot have grammared
she cannot have grammared
we cannot have grammared
you cannot have grammared
they cannot have grammared	I cannot have been grammaring
you cannot have been grammaring
she cannot have been grammaring
we cannot have been grammaring
you cannot have been grammaring
they cannot have been grammaring	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not grammar?
can you not grammar?
can she not grammar?
can we not grammar?
can you not grammar?
can they not grammar? 	can I not be grammaring?
can you not be grammaring?
can she not be grammaring?
can we not be grammaring?
can you not be grammaring?
can they not be grammaring? 	can I not have grammared?
can you not have grammared?
can she not have grammared?
can we not have grammared?
can you not have grammared?
can they not have grammared? 	can I not have been grammaring?
can you not have been grammaring?
can she not have been grammaring?
can we not have been grammaring?
can you not have been grammaring?
can they not have been grammaring?