I may effervesce you may effervesce she may effervesce we may effervesce you may effervesce they may effervesce
V-ing form
I may be effervescing you may be effervescing she may be effervescing we may be effervescing you may be effervescing they may be effervescing
Perfect
I may have effervesced you may have effervesced she may have effervesced we may have effervesced you may have effervesced they may have effervesced
V-ing perfect
I may have been effervescing you may have been effervescing she may have been effervescing we may have been effervescing you may have been effervescing they may have been effervescing
Negation
Simple form
I may not effervesce you may not effervesce she may not effervesce we may not effervesce you may not effervesce they may not effervesce
V-ing form
I may not be effervescing you may not be effervescing she may not be effervescing we may not be effervescing you may not be effervescing they may not be effervescing
Perfect
I may not have effervesced you may not have effervesced she may not have effervesced we may not have effervesced you may not have effervesced they may not have effervesced
V-ing perfect
I may not have been effervescing you may not have been effervescing she may not have been effervescing we may not have been effervescing you may not have been effervescing they may not have been effervescing
Interrogative form
Simple form
may I effervesce? may you effervesce? may she effervesce? may we effervesce? may you effervesce? may they effervesce?
V-ing form
may I be effervescing? may you be effervescing? may she be effervescing? may we be effervescing? may you be effervescing? may they be effervescing?
Perfect
may I have effervesced? may you have effervesced? may she have effervesced? may we have effervesced? may you have effervesced? may they have effervesced?
V-ing perfect
may I have been effervescing? may you have been effervescing? may she have been effervescing? may we have been effervescing? may you have been effervescing? may they have been effervescing?
Interro-negative form
Simple form
may I not effervesce? may you not effervesce? may she not effervesce? may we not effervesce? may you not effervesce? may they not effervesce?
V-ing form
may I not be effervescing? may you not be effervescing? may she not be effervescing? may we not be effervescing? may you not be effervescing? may they not be effervescing?
Perfect
may I not have effervesced? may you not have effervesced? may she not have effervesced? may we not have effervesced? may you not have effervesced? may they not have effervesced?
V-ing perfect
may I not have been effervescing? may you not have been effervescing? may she not have been effervescing? may we not have been effervescing? may you not have been effervescing? may they not have been effervescing?