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