I could magnify you could magnify he could magnify we could magnify you could magnify they could magnify
V-ing form
I could be magnifying you could be magnifying he could be magnifying we could be magnifying you could be magnifying they could be magnifying
Perfect
I could have magnified you could have magnified he could have magnified we could have magnified you could have magnified they could have magnified
V-ing perfect
I could have been magnifying you could have been magnifying he could have been magnifying we could have been magnifying you could have been magnifying they could have been magnifying
Negation
Simple form
I could not magnify you could not magnify he could not magnify we could not magnify you could not magnify they could not magnify
V-ing form
I could not be magnifying you could not be magnifying he could not be magnifying we could not be magnifying you could not be magnifying they could not be magnifying
Perfect
I could not have magnified you could not have magnified he could not have magnified we could not have magnified you could not have magnified they could not have magnified
V-ing perfect
I could not have been magnifying you could not have been magnifying he could not have been magnifying we could not have been magnifying you could not have been magnifying they could not have been magnifying
Interrogative form
Simple form
could I magnify? could you magnify? could he magnify? could we magnify? could you magnify? could they magnify?
V-ing form
could I be magnifying? could you be magnifying? could he be magnifying? could we be magnifying? could you be magnifying? could they be magnifying?
Perfect
could I have magnified? could you have magnified? could he have magnified? could we have magnified? could you have magnified? could they have magnified?
V-ing perfect
could I have been magnifying? could you have been magnifying? could he have been magnifying? could we have been magnifying? could you have been magnifying? could they have been magnifying?
Interro-negative form
Simple form
could I not magnify? could you not magnify? could he not magnify? could we not magnify? could you not magnify? could they not magnify?
V-ing form
could I not be magnifying? could you not be magnifying? could he not be magnifying? could we not be magnifying? could you not be magnifying? could they not be magnifying?
Perfect
could I not have magnified? could you not have magnified? could he not have magnified? could we not have magnified? could you not have magnified? could they not have magnified?
V-ing perfect
could I not have been magnifying? could you not have been magnifying? could he not have been magnifying? could we not have been magnifying? could you not have been magnifying? could they not have been magnifying?