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