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