I can flank you can flank he can flank we can flank you can flank they can flank
V-ing form
I can be flanking you can be flanking he can be flanking we can be flanking you can be flanking they can be flanking
Perfect
I can have flanked you can have flanked he can have flanked we can have flanked you can have flanked they can have flanked
V-ing perfect
I can have been flanking you can have been flanking he can have been flanking we can have been flanking you can have been flanking they can have been flanking
Negation
Simple form
I can't flank you can't flank he can't flank we can't flank you can't flank they can't flank
V-ing form
I can't be flanking you can't be flanking he can't be flanking we can't be flanking you can't be flanking they can't be flanking
Perfect
I can't have flanked you can't have flanked he can't have flanked we can't have flanked you can't have flanked they can't have flanked
V-ing perfect
I can't have been flanking you can't have been flanking he can't have been flanking we can't have been flanking you can't have been flanking they can't have been flanking
Interrogative form
Simple form
can I flank? can you flank? can he flank? can we flank? can you flank? can they flank?
V-ing form
can I be flanking? can you be flanking? can he be flanking? can we be flanking? can you be flanking? can they be flanking?
Perfect
can I have flanked? can you have flanked? can he have flanked? can we have flanked? can you have flanked? can they have flanked?
V-ing perfect
can I have been flanking? can you have been flanking? can he have been flanking? can we have been flanking? can you have been flanking? can they have been flanking?
Interro-negative form
Simple form
can't I flank? can't you flank? can't he flank? can't we flank? can't you flank? can't they flank?
V-ing form
can't I be flanking? can't you be flanking? can't he be flanking? can't we be flanking? can't you be flanking? can't they be flanking?
Perfect
can't I have flanked? can't you have flanked? can't he have flanked? can't we have flanked? can't you have flanked? can't they have flanked?
V-ing perfect
can't I have been flanking? can't you have been flanking? can't he have been flanking? can't we have been flanking? can't you have been flanking? can't they have been flanking?