English verb conjugation
COULD DEBUG

Regular verb: debug - debugged - debugged

Affirmation

Simple form	V-ing form
I could debug you could debug he could debug we could debug you could debug they could debug	I could be debugging you could be debugging he could be debugging we could be debugging you could be debugging they could be debugging
Perfect	V-ing perfect
I could have debugged you could have debugged he could have debugged we could have debugged you could have debugged they could have debugged	I could have been debugging you could have been debugging he could have been debugging we could have been debugging you could have been debugging they could have been debugging

Negation

Simple form	V-ing form
I couldn't debug you couldn't debug he couldn't debug we couldn't debug you couldn't debug they couldn't debug	I couldn't be debugging you couldn't be debugging he couldn't be debugging we couldn't be debugging you couldn't be debugging they couldn't be debugging
Perfect	V-ing perfect
I couldn't have debugged you couldn't have debugged he couldn't have debugged we couldn't have debugged you couldn't have debugged they couldn't have debugged	I couldn't have been debugging you couldn't have been debugging he couldn't have been debugging we couldn't have been debugging you couldn't have been debugging they couldn't have been debugging

Interrogative form

Simple form	V-ing form
could I debug? could you debug? could he debug? could we debug? could you debug? could they debug?	could I be debugging? could you be debugging? could he be debugging? could we be debugging? could you be debugging? could they be debugging?
Perfect	V-ing perfect
could I have debugged? could you have debugged? could he have debugged? could we have debugged? could you have debugged? could they have debugged?	could I have been debugging? could you have been debugging? could he have been debugging? could we have been debugging? could you have been debugging? could they have been debugging?

Interro-negative form

Simple form	V-ing form
couldn't I debug? couldn't you debug? couldn't he debug? couldn't we debug? couldn't you debug? couldn't they debug?	couldn't I be debugging? couldn't you be debugging? couldn't he be debugging? couldn't we be debugging? couldn't you be debugging? couldn't they be debugging?
Perfect	V-ing perfect
couldn't I have debugged? couldn't you have debugged? couldn't he have debugged? couldn't we have debugged? couldn't you have debugged? couldn't they have debugged?	couldn't I have been debugging? couldn't you have been debugging? couldn't he have been debugging? couldn't we have been debugging? couldn't you have been debugging? couldn't they have been debugging?