I could evanesce you could evanesce he could evanesce we could evanesce you could evanesce they could evanesce
V-ing form
I could be evanescing you could be evanescing he could be evanescing we could be evanescing you could be evanescing they could be evanescing
Perfect
I could have evanesced you could have evanesced he could have evanesced we could have evanesced you could have evanesced they could have evanesced
V-ing perfect
I could have been evanescing you could have been evanescing he could have been evanescing we could have been evanescing you could have been evanescing they could have been evanescing
Negation
Simple form
I could not evanesce you could not evanesce he could not evanesce we could not evanesce you could not evanesce they could not evanesce
V-ing form
I could not be evanescing you could not be evanescing he could not be evanescing we could not be evanescing you could not be evanescing they could not be evanescing
Perfect
I could not have evanesced you could not have evanesced he could not have evanesced we could not have evanesced you could not have evanesced they could not have evanesced
V-ing perfect
I could not have been evanescing you could not have been evanescing he could not have been evanescing we could not have been evanescing you could not have been evanescing they could not have been evanescing
Interrogative form
Simple form
could I evanesce? could you evanesce? could he evanesce? could we evanesce? could you evanesce? could they evanesce?
V-ing form
could I be evanescing? could you be evanescing? could he be evanescing? could we be evanescing? could you be evanescing? could they be evanescing?
Perfect
could I have evanesced? could you have evanesced? could he have evanesced? could we have evanesced? could you have evanesced? could they have evanesced?
V-ing perfect
could I have been evanescing? could you have been evanescing? could he have been evanescing? could we have been evanescing? could you have been evanescing? could they have been evanescing?
Interro-negative form
Simple form
could I not evanesce? could you not evanesce? could he not evanesce? could we not evanesce? could you not evanesce? could they not evanesce?
V-ing form
could I not be evanescing? could you not be evanescing? could he not be evanescing? could we not be evanescing? could you not be evanescing? could they not be evanescing?
Perfect
could I not have evanesced? could you not have evanesced? could he not have evanesced? could we not have evanesced? could you not have evanesced? could they not have evanesced?
V-ing perfect
could I not have been evanescing? could you not have been evanescing? could he not have been evanescing? could we not have been evanescing? could you not have been evanescing? could they not have been evanescing?