I can grit you can grit he can grit we can grit you can grit they can grit
V-ing form
I can be gritting you can be gritting he can be gritting we can be gritting you can be gritting they can be gritting
Perfect
I can have gritted you can have gritted he 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 he 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 he cannot grit we cannot grit you cannot grit they cannot grit
V-ing form
I cannot be gritting you cannot be gritting he cannot be gritting we cannot be gritting you cannot be gritting they cannot be gritting
Perfect
I cannot have gritted you cannot have gritted he 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 he 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 he grit? can we grit? can you grit? can they grit?
V-ing form
can I be gritting? can you be gritting? can he be gritting? can we be gritting? can you be gritting? can they be gritting?
Perfect
can I have gritted? can you have gritted? can he 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 he 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 he 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 he 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 he 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 he not have been gritting? can we not have been gritting? can you not have been gritting? can they not have been gritting?