English verb conjugation
COULD E-MAIL

Regular verb: e-mail - e-mailed - e-mailed

Affirmation

Simple form	V-ing form
I could e-mail you could e-mail he could e-mail we could e-mail you could e-mail they could e-mail	I could be e-mailing you could be e-mailing he could be e-mailing we could be e-mailing you could be e-mailing they could be e-mailing
Perfect	V-ing perfect
I could have e-mailed you could have e-mailed he could have e-mailed we could have e-mailed you could have e-mailed they could have e-mailed	I could have been e-mailing you could have been e-mailing he could have been e-mailing we could have been e-mailing you could have been e-mailing they could have been e-mailing

Negation

Simple form	V-ing form
I couldn't e-mail you couldn't e-mail he couldn't e-mail we couldn't e-mail you couldn't e-mail they couldn't e-mail	I couldn't be e-mailing you couldn't be e-mailing he couldn't be e-mailing we couldn't be e-mailing you couldn't be e-mailing they couldn't be e-mailing
Perfect	V-ing perfect
I couldn't have e-mailed you couldn't have e-mailed he couldn't have e-mailed we couldn't have e-mailed you couldn't have e-mailed they couldn't have e-mailed	I couldn't have been e-mailing you couldn't have been e-mailing he couldn't have been e-mailing we couldn't have been e-mailing you couldn't have been e-mailing they couldn't have been e-mailing

Interrogative form

Simple form	V-ing form
could I e-mail? could you e-mail? could he e-mail? could we e-mail? could you e-mail? could they e-mail?	could I be e-mailing? could you be e-mailing? could he be e-mailing? could we be e-mailing? could you be e-mailing? could they be e-mailing?
Perfect	V-ing perfect
could I have e-mailed? could you have e-mailed? could he have e-mailed? could we have e-mailed? could you have e-mailed? could they have e-mailed?	could I have been e-mailing? could you have been e-mailing? could he have been e-mailing? could we have been e-mailing? could you have been e-mailing? could they have been e-mailing?

Interro-negative form

Simple form	V-ing form
couldn't I e-mail? couldn't you e-mail? couldn't he e-mail? couldn't we e-mail? couldn't you e-mail? couldn't they e-mail?	couldn't I be e-mailing? couldn't you be e-mailing? couldn't he be e-mailing? couldn't we be e-mailing? couldn't you be e-mailing? couldn't they be e-mailing?
Perfect	V-ing perfect
couldn't I have e-mailed? couldn't you have e-mailed? couldn't he have e-mailed? couldn't we have e-mailed? couldn't you have e-mailed? couldn't they have e-mailed?	couldn't I have been e-mailing? couldn't you have been e-mailing? couldn't he have been e-mailing? couldn't we have been e-mailing? couldn't you have been e-mailing? couldn't they have been e-mailing?