English verb conjugation
COULD DECONTAMINATE

Regular verb: decontaminate - decontaminated - decontaminated

Affirmation

Simple form	V-ing form
I could decontaminate you could decontaminate he could decontaminate we could decontaminate you could decontaminate they could decontaminate	I could be decontaminating you could be decontaminating he could be decontaminating we could be decontaminating you could be decontaminating they could be decontaminating
Perfect	V-ing perfect
I could have decontaminated you could have decontaminated he could have decontaminated we could have decontaminated you could have decontaminated they could have decontaminated	I could have been decontaminating you could have been decontaminating he could have been decontaminating we could have been decontaminating you could have been decontaminating they could have been decontaminating

Negation

Simple form	V-ing form
I couldn't decontaminate you couldn't decontaminate he couldn't decontaminate we couldn't decontaminate you couldn't decontaminate they couldn't decontaminate	I couldn't be decontaminating you couldn't be decontaminating he couldn't be decontaminating we couldn't be decontaminating you couldn't be decontaminating they couldn't be decontaminating
Perfect	V-ing perfect
I couldn't have decontaminated you couldn't have decontaminated he couldn't have decontaminated we couldn't have decontaminated you couldn't have decontaminated they couldn't have decontaminated	I couldn't have been decontaminating you couldn't have been decontaminating he couldn't have been decontaminating we couldn't have been decontaminating you couldn't have been decontaminating they couldn't have been decontaminating

Interrogative form

Simple form	V-ing form
could I decontaminate? could you decontaminate? could he decontaminate? could we decontaminate? could you decontaminate? could they decontaminate?	could I be decontaminating? could you be decontaminating? could he be decontaminating? could we be decontaminating? could you be decontaminating? could they be decontaminating?
Perfect	V-ing perfect
could I have decontaminated? could you have decontaminated? could he have decontaminated? could we have decontaminated? could you have decontaminated? could they have decontaminated?	could I have been decontaminating? could you have been decontaminating? could he have been decontaminating? could we have been decontaminating? could you have been decontaminating? could they have been decontaminating?

Interro-negative form

Simple form	V-ing form
couldn't I decontaminate? couldn't you decontaminate? couldn't he decontaminate? couldn't we decontaminate? couldn't you decontaminate? couldn't they decontaminate?	couldn't I be decontaminating? couldn't you be decontaminating? couldn't he be decontaminating? couldn't we be decontaminating? couldn't you be decontaminating? couldn't they be decontaminating?
Perfect	V-ing perfect
couldn't I have decontaminated? couldn't you have decontaminated? couldn't he have decontaminated? couldn't we have decontaminated? couldn't you have decontaminated? couldn't they have decontaminated?	couldn't I have been decontaminating? couldn't you have been decontaminating? couldn't he have been decontaminating? couldn't we have been decontaminating? couldn't you have been decontaminating? couldn't they have been decontaminating?