English verb conjugation
COULD HERD

Regular verb: herd - herded - herded

Affirmation

Simple form	V-ing form
I could herd you could herd he could herd we could herd you could herd they could herd	I could be herding you could be herding he could be herding we could be herding you could be herding they could be herding
Perfect	V-ing perfect
I could have herded you could have herded he could have herded we could have herded you could have herded they could have herded	I could have been herding you could have been herding he could have been herding we could have been herding you could have been herding they could have been herding

Negation

Simple form	V-ing form
I couldn't herd you couldn't herd he couldn't herd we couldn't herd you couldn't herd they couldn't herd	I couldn't be herding you couldn't be herding he couldn't be herding we couldn't be herding you couldn't be herding they couldn't be herding
Perfect	V-ing perfect
I couldn't have herded you couldn't have herded he couldn't have herded we couldn't have herded you couldn't have herded they couldn't have herded	I couldn't have been herding you couldn't have been herding he couldn't have been herding we couldn't have been herding you couldn't have been herding they couldn't have been herding

Interrogative form

Simple form	V-ing form
could I herd? could you herd? could he herd? could we herd? could you herd? could they herd?	could I be herding? could you be herding? could he be herding? could we be herding? could you be herding? could they be herding?
Perfect	V-ing perfect
could I have herded? could you have herded? could he have herded? could we have herded? could you have herded? could they have herded?	could I have been herding? could you have been herding? could he have been herding? could we have been herding? could you have been herding? could they have been herding?

Interro-negative form

Simple form	V-ing form
couldn't I herd? couldn't you herd? couldn't he herd? couldn't we herd? couldn't you herd? couldn't they herd?	couldn't I be herding? couldn't you be herding? couldn't he be herding? couldn't we be herding? couldn't you be herding? couldn't they be herding?
Perfect	V-ing perfect
couldn't I have herded? couldn't you have herded? couldn't he have herded? couldn't we have herded? couldn't you have herded? couldn't they have herded?	couldn't I have been herding? couldn't you have been herding? couldn't he have been herding? couldn't we have been herding? couldn't you have been herding? couldn't they have been herding?