English verb conjugation
COULD FLANK

Regular verb: flank - flanked - flanked

Affirmation

Simple form	V-ing form
I could flank you could flank she could flank we could flank you could flank they could flank	I could be flanking you could be flanking she could be flanking we could be flanking you could be flanking they could be flanking
Perfect	V-ing perfect
I could have flanked you could have flanked she could have flanked we could have flanked you could have flanked they could have flanked	I could have been flanking you could have been flanking she could have been flanking we could have been flanking you could have been flanking they could have been flanking

Negation

Simple form	V-ing form
I couldn't flank you couldn't flank she couldn't flank we couldn't flank you couldn't flank they couldn't flank	I couldn't be flanking you couldn't be flanking she couldn't be flanking we couldn't be flanking you couldn't be flanking they couldn't be flanking
Perfect	V-ing perfect
I couldn't have flanked you couldn't have flanked she couldn't have flanked we couldn't have flanked you couldn't have flanked they couldn't have flanked	I couldn't have been flanking you couldn't have been flanking she couldn't have been flanking we couldn't have been flanking you couldn't have been flanking they couldn't have been flanking

Interrogative form

Simple form	V-ing form
could I flank? could you flank? could she flank? could we flank? could you flank? could they flank?	could I be flanking? could you be flanking? could she be flanking? could we be flanking? could you be flanking? could they be flanking?
Perfect	V-ing perfect
could I have flanked? could you have flanked? could she have flanked? could we have flanked? could you have flanked? could they have flanked?	could I have been flanking? could you have been flanking? could she have been flanking? could we have been flanking? could you have been flanking? could they have been flanking?

Interro-negative form

Simple form	V-ing form
couldn't I flank? couldn't you flank? couldn't she flank? couldn't we flank? couldn't you flank? couldn't they flank?	couldn't I be flanking? couldn't you be flanking? couldn't she be flanking? couldn't we be flanking? couldn't you be flanking? couldn't they be flanking?
Perfect	V-ing perfect
couldn't I have flanked? couldn't you have flanked? couldn't she have flanked? couldn't we have flanked? couldn't you have flanked? couldn't they have flanked?	couldn't I have been flanking? couldn't you have been flanking? couldn't she have been flanking? couldn't we have been flanking? couldn't you have been flanking? couldn't they have been flanking?