English verb conjugation
COULD CONVERT

Regular verb: convert - converted - converted

Affirmation

Simple form	V-ing form
I could convert you could convert he could convert we could convert you could convert they could convert	I could be converting you could be converting he could be converting we could be converting you could be converting they could be converting
Perfect	V-ing perfect
I could have converted you could have converted he could have converted we could have converted you could have converted they could have converted	I could have been converting you could have been converting he could have been converting we could have been converting you could have been converting they could have been converting

Negation

Simple form	V-ing form
I couldn't convert you couldn't convert he couldn't convert we couldn't convert you couldn't convert they couldn't convert	I couldn't be converting you couldn't be converting he couldn't be converting we couldn't be converting you couldn't be converting they couldn't be converting
Perfect	V-ing perfect
I couldn't have converted you couldn't have converted he couldn't have converted we couldn't have converted you couldn't have converted they couldn't have converted	I couldn't have been converting you couldn't have been converting he couldn't have been converting we couldn't have been converting you couldn't have been converting they couldn't have been converting

Interrogative form

Simple form	V-ing form
could I convert? could you convert? could he convert? could we convert? could you convert? could they convert?	could I be converting? could you be converting? could he be converting? could we be converting? could you be converting? could they be converting?
Perfect	V-ing perfect
could I have converted? could you have converted? could he have converted? could we have converted? could you have converted? could they have converted?	could I have been converting? could you have been converting? could he have been converting? could we have been converting? could you have been converting? could they have been converting?

Interro-negative form

Simple form	V-ing form
couldn't I convert? couldn't you convert? couldn't he convert? couldn't we convert? couldn't you convert? couldn't they convert?	couldn't I be converting? couldn't you be converting? couldn't he be converting? couldn't we be converting? couldn't you be converting? couldn't they be converting?
Perfect	V-ing perfect
couldn't I have converted? couldn't you have converted? couldn't he have converted? couldn't we have converted? couldn't you have converted? couldn't they have converted?	couldn't I have been converting? couldn't you have been converting? couldn't he have been converting? couldn't we have been converting? couldn't you have been converting? couldn't they have been converting?