English verb conjugation
COULD REDRILL

Regular verb: redrill - redrilled - redrilled

Affirmation

Simple form	V-ing form
I could redrill you could redrill he could redrill we could redrill you could redrill they could redrill	I could be redrilling you could be redrilling he could be redrilling we could be redrilling you could be redrilling they could be redrilling
Perfect	V-ing perfect
I could have redrilled you could have redrilled he could have redrilled we could have redrilled you could have redrilled they could have redrilled	I could have been redrilling you could have been redrilling he could have been redrilling we could have been redrilling you could have been redrilling they could have been redrilling

Negation

Simple form	V-ing form
I couldn't redrill you couldn't redrill he couldn't redrill we couldn't redrill you couldn't redrill they couldn't redrill	I couldn't be redrilling you couldn't be redrilling he couldn't be redrilling we couldn't be redrilling you couldn't be redrilling they couldn't be redrilling
Perfect	V-ing perfect
I couldn't have redrilled you couldn't have redrilled he couldn't have redrilled we couldn't have redrilled you couldn't have redrilled they couldn't have redrilled	I couldn't have been redrilling you couldn't have been redrilling he couldn't have been redrilling we couldn't have been redrilling you couldn't have been redrilling they couldn't have been redrilling

Interrogative form

Simple form	V-ing form
could I redrill? could you redrill? could he redrill? could we redrill? could you redrill? could they redrill?	could I be redrilling? could you be redrilling? could he be redrilling? could we be redrilling? could you be redrilling? could they be redrilling?
Perfect	V-ing perfect
could I have redrilled? could you have redrilled? could he have redrilled? could we have redrilled? could you have redrilled? could they have redrilled?	could I have been redrilling? could you have been redrilling? could he have been redrilling? could we have been redrilling? could you have been redrilling? could they have been redrilling?

Interro-negative form

Simple form	V-ing form
couldn't I redrill? couldn't you redrill? couldn't he redrill? couldn't we redrill? couldn't you redrill? couldn't they redrill?	couldn't I be redrilling? couldn't you be redrilling? couldn't he be redrilling? couldn't we be redrilling? couldn't you be redrilling? couldn't they be redrilling?
Perfect	V-ing perfect
couldn't I have redrilled? couldn't you have redrilled? couldn't he have redrilled? couldn't we have redrilled? couldn't you have redrilled? couldn't they have redrilled?	couldn't I have been redrilling? couldn't you have been redrilling? couldn't he have been redrilling? couldn't we have been redrilling? couldn't you have been redrilling? couldn't they have been redrilling?