English verb conjugation
COULD EFFERVESCE

Regular verb: effervesce - effervesced - effervesced

Affirmation

Simple form	V-ing form
I could effervesce you could effervesce he could effervesce we could effervesce you could effervesce they could effervesce	I could be effervescing you could be effervescing he could be effervescing we could be effervescing you could be effervescing they could be effervescing
Perfect	V-ing perfect
I could have effervesced you could have effervesced he could have effervesced we could have effervesced you could have effervesced they could have effervesced	I could have been effervescing you could have been effervescing he could have been effervescing we could have been effervescing you could have been effervescing they could have been effervescing

Negation

Simple form	V-ing form
I could not effervesce you could not effervesce he could not effervesce we could not effervesce you could not effervesce they could not effervesce	I could not be effervescing you could not be effervescing he could not be effervescing we could not be effervescing you could not be effervescing they could not be effervescing
Perfect	V-ing perfect
I could not have effervesced you could not have effervesced he could not have effervesced we could not have effervesced you could not have effervesced they could not have effervesced	I could not have been effervescing you could not have been effervescing he could not have been effervescing we could not have been effervescing you could not have been effervescing they could not have been effervescing

Interrogative form

Simple form	V-ing form
could I effervesce? could you effervesce? could he effervesce? could we effervesce? could you effervesce? could they effervesce?	could I be effervescing? could you be effervescing? could he be effervescing? could we be effervescing? could you be effervescing? could they be effervescing?
Perfect	V-ing perfect
could I have effervesced? could you have effervesced? could he have effervesced? could we have effervesced? could you have effervesced? could they have effervesced?	could I have been effervescing? could you have been effervescing? could he have been effervescing? could we have been effervescing? could you have been effervescing? could they have been effervescing?

Interro-negative form

Simple form	V-ing form
could I not effervesce? could you not effervesce? could he not effervesce? could we not effervesce? could you not effervesce? could they not effervesce?	could I not be effervescing? could you not be effervescing? could he not be effervescing? could we not be effervescing? could you not be effervescing? could they not be effervescing?
Perfect	V-ing perfect
could I not have effervesced? could you not have effervesced? could he not have effervesced? could we not have effervesced? could you not have effervesced? could they not have effervesced?	could I not have been effervescing? could you not have been effervescing? could he not have been effervescing? could we not have been effervescing? could you not have been effervescing? could they not have been effervescing?