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