English verb conjugation
COULD COMPILE

Regular verb: compile - compiled - compiled

Affirmation

Simple form	V-ing form
I could compile you could compile he could compile we could compile you could compile they could compile	I could be compiling you could be compiling he could be compiling we could be compiling you could be compiling they could be compiling
Perfect	V-ing perfect
I could have compiled you could have compiled he could have compiled we could have compiled you could have compiled they could have compiled	I could have been compiling you could have been compiling he could have been compiling we could have been compiling you could have been compiling they could have been compiling

Negation

Simple form	V-ing form
I couldn't compile you couldn't compile he couldn't compile we couldn't compile you couldn't compile they couldn't compile	I couldn't be compiling you couldn't be compiling he couldn't be compiling we couldn't be compiling you couldn't be compiling they couldn't be compiling
Perfect	V-ing perfect
I couldn't have compiled you couldn't have compiled he couldn't have compiled we couldn't have compiled you couldn't have compiled they couldn't have compiled	I couldn't have been compiling you couldn't have been compiling he couldn't have been compiling we couldn't have been compiling you couldn't have been compiling they couldn't have been compiling

Interrogative form

Simple form	V-ing form
could I compile? could you compile? could he compile? could we compile? could you compile? could they compile?	could I be compiling? could you be compiling? could he be compiling? could we be compiling? could you be compiling? could they be compiling?
Perfect	V-ing perfect
could I have compiled? could you have compiled? could he have compiled? could we have compiled? could you have compiled? could they have compiled?	could I have been compiling? could you have been compiling? could he have been compiling? could we have been compiling? could you have been compiling? could they have been compiling?

Interro-negative form

Simple form	V-ing form
couldn't I compile? couldn't you compile? couldn't he compile? couldn't we compile? couldn't you compile? couldn't they compile?	couldn't I be compiling? couldn't you be compiling? couldn't he be compiling? couldn't we be compiling? couldn't you be compiling? couldn't they be compiling?
Perfect	V-ing perfect
couldn't I have compiled? couldn't you have compiled? couldn't he have compiled? couldn't we have compiled? couldn't you have compiled? couldn't they have compiled?	couldn't I have been compiling? couldn't you have been compiling? couldn't he have been compiling? couldn't we have been compiling? couldn't you have been compiling? couldn't they have been compiling?