English verb conjugation
COULD PREDRILL

Regular verb: predrill - predrilled - predrilled

Affirmation

Simple form	V-ing form
I could predrill you could predrill she could predrill we could predrill you could predrill they could predrill	I could be predrilling you could be predrilling she could be predrilling we could be predrilling you could be predrilling they could be predrilling
Perfect	V-ing perfect
I could have predrilled you could have predrilled she could have predrilled we could have predrilled you could have predrilled they could have predrilled	I could have been predrilling you could have been predrilling she could have been predrilling we could have been predrilling you could have been predrilling they could have been predrilling

Negation

Simple form	V-ing form
I couldn't predrill you couldn't predrill she couldn't predrill we couldn't predrill you couldn't predrill they couldn't predrill	I couldn't be predrilling you couldn't be predrilling she couldn't be predrilling we couldn't be predrilling you couldn't be predrilling they couldn't be predrilling
Perfect	V-ing perfect
I couldn't have predrilled you couldn't have predrilled she couldn't have predrilled we couldn't have predrilled you couldn't have predrilled they couldn't have predrilled	I couldn't have been predrilling you couldn't have been predrilling she couldn't have been predrilling we couldn't have been predrilling you couldn't have been predrilling they couldn't have been predrilling

Interrogative form

Simple form	V-ing form
could I predrill? could you predrill? could she predrill? could we predrill? could you predrill? could they predrill?	could I be predrilling? could you be predrilling? could she be predrilling? could we be predrilling? could you be predrilling? could they be predrilling?
Perfect	V-ing perfect
could I have predrilled? could you have predrilled? could she have predrilled? could we have predrilled? could you have predrilled? could they have predrilled?	could I have been predrilling? could you have been predrilling? could she have been predrilling? could we have been predrilling? could you have been predrilling? could they have been predrilling?

Interro-negative form

Simple form	V-ing form
couldn't I predrill? couldn't you predrill? couldn't she predrill? couldn't we predrill? couldn't you predrill? couldn't they predrill?	couldn't I be predrilling? couldn't you be predrilling? couldn't she be predrilling? couldn't we be predrilling? couldn't you be predrilling? couldn't they be predrilling?
Perfect	V-ing perfect
couldn't I have predrilled? couldn't you have predrilled? couldn't she have predrilled? couldn't we have predrilled? couldn't you have predrilled? couldn't they have predrilled?	couldn't I have been predrilling? couldn't you have been predrilling? couldn't she have been predrilling? couldn't we have been predrilling? couldn't you have been predrilling? couldn't they have been predrilling?