I could arise you could arise she could arise we could arise you could arise they could arise
V-ing form
I could be arising you could be arising she could be arising we could be arising you could be arising they could be arising
Perfect
I could have arisen you could have arisen she could have arisen we could have arisen you could have arisen they could have arisen
V-ing perfect
I could have been arising you could have been arising she could have been arising we could have been arising you could have been arising they could have been arising
Negation
Simple form
I could not arise you could not arise she could not arise we could not arise you could not arise they could not arise
V-ing form
I could not be arising you could not be arising she could not be arising we could not be arising you could not be arising they could not be arising
Perfect
I could not have arisen you could not have arisen she could not have arisen we could not have arisen you could not have arisen they could not have arisen
V-ing perfect
I could not have been arising you could not have been arising she could not have been arising we could not have been arising you could not have been arising they could not have been arising
Interrogative form
Simple form
could I arise? could you arise? could she arise? could we arise? could you arise? could they arise?
V-ing form
could I be arising? could you be arising? could she be arising? could we be arising? could you be arising? could they be arising?
Perfect
could I have arisen? could you have arisen? could she have arisen? could we have arisen? could you have arisen? could they have arisen?
V-ing perfect
could I have been arising? could you have been arising? could she have been arising? could we have been arising? could you have been arising? could they have been arising?
Interro-negative form
Simple form
could I not arise? could you not arise? could she not arise? could we not arise? could you not arise? could they not arise?
V-ing form
could I not be arising? could you not be arising? could she not be arising? could we not be arising? could you not be arising? could they not be arising?
Perfect
could I not have arisen? could you not have arisen? could she not have arisen? could we not have arisen? could you not have arisen? could they not have arisen?
V-ing perfect
could I not have been arising? could you not have been arising? could she not have been arising? could we not have been arising? could you not have been arising? could they not have been arising?