I could compile you could compile he could compile we could compile you could compile they could compile
V-ing form
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
I could have compiled you could have compiled he could have compiled we could have compiled you could have compiled they could have compiled
V-ing perfect
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
I could not compile you could not compile he could not compile we could not compile you could not compile they could not compile
V-ing form
I could not be compiling you could not be compiling he could not be compiling we could not be compiling you could not be compiling they could not be compiling
Perfect
I could not have compiled you could not have compiled he could not have compiled we could not have compiled you could not have compiled they could not have compiled
V-ing perfect
I could not have been compiling you could not have been compiling he could not have been compiling we could not have been compiling you could not have been compiling they could not have been compiling
Interrogative form
Simple form
could I compile? could you compile? could he compile? could we compile? could you compile? could they compile?
V-ing form
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
could I have compiled? could you have compiled? could he have compiled? could we have compiled? could you have compiled? could they have compiled?
V-ing perfect
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
could I not compile? could you not compile? could he not compile? could we not compile? could you not compile? could they not compile?
V-ing form
could I not be compiling? could you not be compiling? could he not be compiling? could we not be compiling? could you not be compiling? could they not be compiling?
Perfect
could I not have compiled? could you not have compiled? could he not have compiled? could we not have compiled? could you not have compiled? could they not have compiled?
V-ing perfect
could I not have been compiling? could you not have been compiling? could he not have been compiling? could we not have been compiling? could you not have been compiling? could they not have been compiling?