English verb conjugation
COULD DECONTAMINATE

Regular verb: decontaminate - decontaminated - decontaminated

Affirmation

Simple form	V-ing form
I could decontaminate you could decontaminate she could decontaminate we could decontaminate you could decontaminate they could decontaminate	I could be decontaminating you could be decontaminating she 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 she 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 she 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 she 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 she 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 she 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 she 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 she decontaminate? could we decontaminate? could you decontaminate? could they decontaminate?	could I be decontaminating? could you be decontaminating? could she 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 she 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 she 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 she 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 she 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 she 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 she have been decontaminating? couldn't we have been decontaminating? couldn't you have been decontaminating? couldn't they have been decontaminating?