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 can't grit you can't grit he can't grit we can't grit you can't grit they can't grit
V-ing form
I can't be gritting you can't be gritting he can't be gritting we can't be gritting you can't be gritting they can't be gritting
Perfect
I can't have gritted you can't have gritted he can't have gritted we can't have gritted you can't have gritted they can't have gritted
V-ing perfect
I can't have been gritting you can't have been gritting he can't have been gritting we can't have been gritting you can't have been gritting they can't 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't I grit? can't you grit? can't he grit? can't we grit? can't you grit? can't they grit?
V-ing form
can't I be gritting? can't you be gritting? can't he be gritting? can't we be gritting? can't you be gritting? can't they be gritting?
Perfect
can't I have gritted? can't you have gritted? can't he have gritted? can't we have gritted? can't you have gritted? can't they have gritted?
V-ing perfect
can't I have been gritting? can't you have been gritting? can't he have been gritting? can't we have been gritting? can't you have been gritting? can't they have been gritting?