English verb conjugation
COULD CLARIFY

Regular verb: clarify - clarified - clarified

Affirmation

Simple form	V-ing form
I could clarify you could clarify he could clarify we could clarify you could clarify they could clarify	I could be clarifying you could be clarifying he could be clarifying we could be clarifying you could be clarifying they could be clarifying
Perfect	V-ing perfect
I could have clarified you could have clarified he could have clarified we could have clarified you could have clarified they could have clarified	I could have been clarifying you could have been clarifying he could have been clarifying we could have been clarifying you could have been clarifying they could have been clarifying

Negation

Simple form	V-ing form
I couldn't clarify you couldn't clarify he couldn't clarify we couldn't clarify you couldn't clarify they couldn't clarify	I couldn't be clarifying you couldn't be clarifying he couldn't be clarifying we couldn't be clarifying you couldn't be clarifying they couldn't be clarifying
Perfect	V-ing perfect
I couldn't have clarified you couldn't have clarified he couldn't have clarified we couldn't have clarified you couldn't have clarified they couldn't have clarified	I couldn't have been clarifying you couldn't have been clarifying he couldn't have been clarifying we couldn't have been clarifying you couldn't have been clarifying they couldn't have been clarifying

Interrogative form

Simple form	V-ing form
could I clarify? could you clarify? could he clarify? could we clarify? could you clarify? could they clarify?	could I be clarifying? could you be clarifying? could he be clarifying? could we be clarifying? could you be clarifying? could they be clarifying?
Perfect	V-ing perfect
could I have clarified? could you have clarified? could he have clarified? could we have clarified? could you have clarified? could they have clarified?	could I have been clarifying? could you have been clarifying? could he have been clarifying? could we have been clarifying? could you have been clarifying? could they have been clarifying?

Interro-negative form

Simple form	V-ing form
couldn't I clarify? couldn't you clarify? couldn't he clarify? couldn't we clarify? couldn't you clarify? couldn't they clarify?	couldn't I be clarifying? couldn't you be clarifying? couldn't he be clarifying? couldn't we be clarifying? couldn't you be clarifying? couldn't they be clarifying?
Perfect	V-ing perfect
couldn't I have clarified? couldn't you have clarified? couldn't he have clarified? couldn't we have clarified? couldn't you have clarified? couldn't they have clarified?	couldn't I have been clarifying? couldn't you have been clarifying? couldn't he have been clarifying? couldn't we have been clarifying? couldn't you have been clarifying? couldn't they have been clarifying?