English verb conjugation
COULD EMAIL

Regular verb: email - emailed - emailed

Affirmation

Simple form	V-ing form
I could email you could email he could email we could email you could email they could email	I could be emailing you could be emailing he could be emailing we could be emailing you could be emailing they could be emailing
Perfect	V-ing perfect
I could have emailed you could have emailed he could have emailed we could have emailed you could have emailed they could have emailed	I could have been emailing you could have been emailing he could have been emailing we could have been emailing you could have been emailing they could have been emailing

Negation

Simple form	V-ing form
I couldn't email you couldn't email he couldn't email we couldn't email you couldn't email they couldn't email	I couldn't be emailing you couldn't be emailing he couldn't be emailing we couldn't be emailing you couldn't be emailing they couldn't be emailing
Perfect	V-ing perfect
I couldn't have emailed you couldn't have emailed he couldn't have emailed we couldn't have emailed you couldn't have emailed they couldn't have emailed	I couldn't have been emailing you couldn't have been emailing he couldn't have been emailing we couldn't have been emailing you couldn't have been emailing they couldn't have been emailing

Interrogative form

Simple form	V-ing form
could I email? could you email? could he email? could we email? could you email? could they email?	could I be emailing? could you be emailing? could he be emailing? could we be emailing? could you be emailing? could they be emailing?
Perfect	V-ing perfect
could I have emailed? could you have emailed? could he have emailed? could we have emailed? could you have emailed? could they have emailed?	could I have been emailing? could you have been emailing? could he have been emailing? could we have been emailing? could you have been emailing? could they have been emailing?

Interro-negative form

Simple form	V-ing form
couldn't I email? couldn't you email? couldn't he email? couldn't we email? couldn't you email? couldn't they email?	couldn't I be emailing? couldn't you be emailing? couldn't he be emailing? couldn't we be emailing? couldn't you be emailing? couldn't they be emailing?
Perfect	V-ing perfect
couldn't I have emailed? couldn't you have emailed? couldn't he have emailed? couldn't we have emailed? couldn't you have emailed? couldn't they have emailed?	couldn't I have been emailing? couldn't you have been emailing? couldn't he have been emailing? couldn't we have been emailing? couldn't you have been emailing? couldn't they have been emailing?