English verb conjugation
COULD TELECONFERENCE

Regular verb: teleconference - teleconferenced - teleconferenced

Affirmation

Simple form	V-ing form
I could teleconference you could teleconference he could teleconference we could teleconference you could teleconference they could teleconference	I could be teleconferencing you could be teleconferencing he could be teleconferencing we could be teleconferencing you could be teleconferencing they could be teleconferencing
Perfect	V-ing perfect
I could have teleconferenced you could have teleconferenced he could have teleconferenced we could have teleconferenced you could have teleconferenced they could have teleconferenced	I could have been teleconferencing you could have been teleconferencing he could have been teleconferencing we could have been teleconferencing you could have been teleconferencing they could have been teleconferencing

Negation

Simple form	V-ing form
I couldn't teleconference you couldn't teleconference he couldn't teleconference we couldn't teleconference you couldn't teleconference they couldn't teleconference	I couldn't be teleconferencing you couldn't be teleconferencing he couldn't be teleconferencing we couldn't be teleconferencing you couldn't be teleconferencing they couldn't be teleconferencing
Perfect	V-ing perfect
I couldn't have teleconferenced you couldn't have teleconferenced he couldn't have teleconferenced we couldn't have teleconferenced you couldn't have teleconferenced they couldn't have teleconferenced	I couldn't have been teleconferencing you couldn't have been teleconferencing he couldn't have been teleconferencing we couldn't have been teleconferencing you couldn't have been teleconferencing they couldn't have been teleconferencing

Interrogative form

Simple form	V-ing form
could I teleconference? could you teleconference? could he teleconference? could we teleconference? could you teleconference? could they teleconference?	could I be teleconferencing? could you be teleconferencing? could he be teleconferencing? could we be teleconferencing? could you be teleconferencing? could they be teleconferencing?
Perfect	V-ing perfect
could I have teleconferenced? could you have teleconferenced? could he have teleconferenced? could we have teleconferenced? could you have teleconferenced? could they have teleconferenced?	could I have been teleconferencing? could you have been teleconferencing? could he have been teleconferencing? could we have been teleconferencing? could you have been teleconferencing? could they have been teleconferencing?

Interro-negative form

Simple form	V-ing form
couldn't I teleconference? couldn't you teleconference? couldn't he teleconference? couldn't we teleconference? couldn't you teleconference? couldn't they teleconference?	couldn't I be teleconferencing? couldn't you be teleconferencing? couldn't he be teleconferencing? couldn't we be teleconferencing? couldn't you be teleconferencing? couldn't they be teleconferencing?
Perfect	V-ing perfect
couldn't I have teleconferenced? couldn't you have teleconferenced? couldn't he have teleconferenced? couldn't we have teleconferenced? couldn't you have teleconferenced? couldn't they have teleconferenced?	couldn't I have been teleconferencing? couldn't you have been teleconferencing? couldn't he have been teleconferencing? couldn't we have been teleconferencing? couldn't you have been teleconferencing? couldn't they have been teleconferencing?