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