English verb conjugation
COULD FRISK

Regular verb: frisk - frisked - frisked

Affirmation

Simple form	V-ing form
I could frisk you could frisk he could frisk we could frisk you could frisk they could frisk	I could be frisking you could be frisking he could be frisking we could be frisking you could be frisking they could be frisking
Perfect	V-ing perfect
I could have frisked you could have frisked he could have frisked we could have frisked you could have frisked they could have frisked	I could have been frisking you could have been frisking he could have been frisking we could have been frisking you could have been frisking they could have been frisking

Negation

Simple form	V-ing form
I couldn't frisk you couldn't frisk he couldn't frisk we couldn't frisk you couldn't frisk they couldn't frisk	I couldn't be frisking you couldn't be frisking he couldn't be frisking we couldn't be frisking you couldn't be frisking they couldn't be frisking
Perfect	V-ing perfect
I couldn't have frisked you couldn't have frisked he couldn't have frisked we couldn't have frisked you couldn't have frisked they couldn't have frisked	I couldn't have been frisking you couldn't have been frisking he couldn't have been frisking we couldn't have been frisking you couldn't have been frisking they couldn't have been frisking

Interrogative form

Simple form	V-ing form
could I frisk? could you frisk? could he frisk? could we frisk? could you frisk? could they frisk?	could I be frisking? could you be frisking? could he be frisking? could we be frisking? could you be frisking? could they be frisking?
Perfect	V-ing perfect
could I have frisked? could you have frisked? could he have frisked? could we have frisked? could you have frisked? could they have frisked?	could I have been frisking? could you have been frisking? could he have been frisking? could we have been frisking? could you have been frisking? could they have been frisking?

Interro-negative form

Simple form	V-ing form
couldn't I frisk? couldn't you frisk? couldn't he frisk? couldn't we frisk? couldn't you frisk? couldn't they frisk?	couldn't I be frisking? couldn't you be frisking? couldn't he be frisking? couldn't we be frisking? couldn't you be frisking? couldn't they be frisking?
Perfect	V-ing perfect
couldn't I have frisked? couldn't you have frisked? couldn't he have frisked? couldn't we have frisked? couldn't you have frisked? couldn't they have frisked?	couldn't I have been frisking? couldn't you have been frisking? couldn't he have been frisking? couldn't we have been frisking? couldn't you have been frisking? couldn't they have been frisking?