I could arise you could arise he could arise we could arise you could arise they could arise
V-ing form
I could be arising you could be arising he could be arising we could be arising you could be arising they could be arising
Perfect
I could have arisen you could have arisen he 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 he could have been arising we could have been arising you could have been arising they could have been arising
Negation
Simple form
I couldn't arise you couldn't arise he couldn't arise we couldn't arise you couldn't arise they couldn't arise
V-ing form
I couldn't be arising you couldn't be arising he couldn't be arising we couldn't be arising you couldn't be arising they couldn't be arising
Perfect
I couldn't have arisen you couldn't have arisen he couldn't have arisen we couldn't have arisen you couldn't have arisen they couldn't have arisen
V-ing perfect
I couldn't have been arising you couldn't have been arising he couldn't have been arising we couldn't have been arising you couldn't have been arising they couldn't have been arising
Interrogative form
Simple form
could I arise? could you arise? could he arise? could we arise? could you arise? could they arise?
V-ing form
could I be arising? could you be arising? could he be arising? could we be arising? could you be arising? could they be arising?
Perfect
could I have arisen? could you have arisen? could he 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 he have been arising? could we have been arising? could you have been arising? could they have been arising?
Interro-negative form
Simple form
couldn't I arise? couldn't you arise? couldn't he arise? couldn't we arise? couldn't you arise? couldn't they arise?
V-ing form
couldn't I be arising? couldn't you be arising? couldn't he be arising? couldn't we be arising? couldn't you be arising? couldn't they be arising?
Perfect
couldn't I have arisen? couldn't you have arisen? couldn't he have arisen? couldn't we have arisen? couldn't you have arisen? couldn't they have arisen?
V-ing perfect
couldn't I have been arising? couldn't you have been arising? couldn't he have been arising? couldn't we have been arising? couldn't you have been arising? couldn't they have been arising?