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