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