English verb conjugation
COULD CROSS-REFERENCE

Regular verb: cross-reference - cross-referenced - cross-referenced

Affirmation

Simple form	V-ing form
I could cross-reference you could cross-reference he could cross-reference we could cross-reference you could cross-reference they could cross-reference	I could be cross-referencing you could be cross-referencing he could be cross-referencing we could be cross-referencing you could be cross-referencing they could be cross-referencing
Perfect	V-ing perfect
I could have cross-referenced you could have cross-referenced he could have cross-referenced we could have cross-referenced you could have cross-referenced they could have cross-referenced	I could have been cross-referencing you could have been cross-referencing he could have been cross-referencing we could have been cross-referencing you could have been cross-referencing they could have been cross-referencing

Negation

Simple form	V-ing form
I couldn't cross-reference you couldn't cross-reference he couldn't cross-reference we couldn't cross-reference you couldn't cross-reference they couldn't cross-reference	I couldn't be cross-referencing you couldn't be cross-referencing he couldn't be cross-referencing we couldn't be cross-referencing you couldn't be cross-referencing they couldn't be cross-referencing
Perfect	V-ing perfect
I couldn't have cross-referenced you couldn't have cross-referenced he couldn't have cross-referenced we couldn't have cross-referenced you couldn't have cross-referenced they couldn't have cross-referenced	I couldn't have been cross-referencing you couldn't have been cross-referencing he couldn't have been cross-referencing we couldn't have been cross-referencing you couldn't have been cross-referencing they couldn't have been cross-referencing

Interrogative form

Simple form	V-ing form
could I cross-reference? could you cross-reference? could he cross-reference? could we cross-reference? could you cross-reference? could they cross-reference?	could I be cross-referencing? could you be cross-referencing? could he be cross-referencing? could we be cross-referencing? could you be cross-referencing? could they be cross-referencing?
Perfect	V-ing perfect
could I have cross-referenced? could you have cross-referenced? could he have cross-referenced? could we have cross-referenced? could you have cross-referenced? could they have cross-referenced?	could I have been cross-referencing? could you have been cross-referencing? could he have been cross-referencing? could we have been cross-referencing? could you have been cross-referencing? could they have been cross-referencing?

Interro-negative form

Simple form	V-ing form
couldn't I cross-reference? couldn't you cross-reference? couldn't he cross-reference? couldn't we cross-reference? couldn't you cross-reference? couldn't they cross-reference?	couldn't I be cross-referencing? couldn't you be cross-referencing? couldn't he be cross-referencing? couldn't we be cross-referencing? couldn't you be cross-referencing? couldn't they be cross-referencing?
Perfect	V-ing perfect
couldn't I have cross-referenced? couldn't you have cross-referenced? couldn't he have cross-referenced? couldn't we have cross-referenced? couldn't you have cross-referenced? couldn't they have cross-referenced?	couldn't I have been cross-referencing? couldn't you have been cross-referencing? couldn't he have been cross-referencing? couldn't we have been cross-referencing? couldn't you have been cross-referencing? couldn't they have been cross-referencing?