English verb conjugation
COULD STROP

Regular verb: strop - stropped - stropped

Affirmation

Simple form	V-ing form
I could strop you could strop he could strop we could strop you could strop they could strop	I could be stropping you could be stropping he could be stropping we could be stropping you could be stropping they could be stropping
Perfect	V-ing perfect
I could have stropped you could have stropped he could have stropped we could have stropped you could have stropped they could have stropped	I could have been stropping you could have been stropping he could have been stropping we could have been stropping you could have been stropping they could have been stropping

Negation

Simple form	V-ing form
I couldn't strop you couldn't strop he couldn't strop we couldn't strop you couldn't strop they couldn't strop	I couldn't be stropping you couldn't be stropping he couldn't be stropping we couldn't be stropping you couldn't be stropping they couldn't be stropping
Perfect	V-ing perfect
I couldn't have stropped you couldn't have stropped he couldn't have stropped we couldn't have stropped you couldn't have stropped they couldn't have stropped	I couldn't have been stropping you couldn't have been stropping he couldn't have been stropping we couldn't have been stropping you couldn't have been stropping they couldn't have been stropping

Interrogative form

Simple form	V-ing form
could I strop? could you strop? could he strop? could we strop? could you strop? could they strop?	could I be stropping? could you be stropping? could he be stropping? could we be stropping? could you be stropping? could they be stropping?
Perfect	V-ing perfect
could I have stropped? could you have stropped? could he have stropped? could we have stropped? could you have stropped? could they have stropped?	could I have been stropping? could you have been stropping? could he have been stropping? could we have been stropping? could you have been stropping? could they have been stropping?

Interro-negative form

Simple form	V-ing form
couldn't I strop? couldn't you strop? couldn't he strop? couldn't we strop? couldn't you strop? couldn't they strop?	couldn't I be stropping? couldn't you be stropping? couldn't he be stropping? couldn't we be stropping? couldn't you be stropping? couldn't they be stropping?
Perfect	V-ing perfect
couldn't I have stropped? couldn't you have stropped? couldn't he have stropped? couldn't we have stropped? couldn't you have stropped? couldn't they have stropped?	couldn't I have been stropping? couldn't you have been stropping? couldn't he have been stropping? couldn't we have been stropping? couldn't you have been stropping? couldn't they have been stropping?