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