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