I can grit you can grit she can grit we can grit you can grit they can grit
V-ing form
I can be gritting you can be gritting she can be gritting we can be gritting you can be gritting they can be gritting
Perfect
I can have gritted you can have gritted she can have gritted we can have gritted you can have gritted they can have gritted
V-ing perfect
I can have been gritting you can have been gritting she can have been gritting we can have been gritting you can have been gritting they can have been gritting
Negation
Simple form
I cannot grit you cannot grit she cannot grit we cannot grit you cannot grit they cannot grit
V-ing form
I cannot be gritting you cannot be gritting she cannot be gritting we cannot be gritting you cannot be gritting they cannot be gritting
Perfect
I cannot have gritted you cannot have gritted she cannot have gritted we cannot have gritted you cannot have gritted they cannot have gritted
V-ing perfect
I cannot have been gritting you cannot have been gritting she cannot have been gritting we cannot have been gritting you cannot have been gritting they cannot have been gritting
Interrogative form
Simple form
can I grit? can you grit? can she grit? can we grit? can you grit? can they grit?
V-ing form
can I be gritting? can you be gritting? can she be gritting? can we be gritting? can you be gritting? can they be gritting?
Perfect
can I have gritted? can you have gritted? can she have gritted? can we have gritted? can you have gritted? can they have gritted?
V-ing perfect
can I have been gritting? can you have been gritting? can she have been gritting? can we have been gritting? can you have been gritting? can they have been gritting?
Interro-negative form
Simple form
can I not grit? can you not grit? can she not grit? can we not grit? can you not grit? can they not grit?
V-ing form
can I not be gritting? can you not be gritting? can she not be gritting? can we not be gritting? can you not be gritting? can they not be gritting?
Perfect
can I not have gritted? can you not have gritted? can she not have gritted? can we not have gritted? can you not have gritted? can they not have gritted?
V-ing perfect
can I not have been gritting? can you not have been gritting? can she not have been gritting? can we not have been gritting? can you not have been gritting? can they not have been gritting?