I could cross-react you could cross-react she could cross-react we could cross-react you could cross-react they could cross-react
V-ing form
I could be cross-reacting you could be cross-reacting she could be cross-reacting we could be cross-reacting you could be cross-reacting they could be cross-reacting
Perfect
I could have cross-reacted you could have cross-reacted she could have cross-reacted we could have cross-reacted you could have cross-reacted they could have cross-reacted
V-ing perfect
I could have been cross-reacting you could have been cross-reacting she could have been cross-reacting we could have been cross-reacting you could have been cross-reacting they could have been cross-reacting
Negation
Simple form
I couldn't cross-react you couldn't cross-react she couldn't cross-react we couldn't cross-react you couldn't cross-react they couldn't cross-react
V-ing form
I couldn't be cross-reacting you couldn't be cross-reacting she couldn't be cross-reacting we couldn't be cross-reacting you couldn't be cross-reacting they couldn't be cross-reacting
Perfect
I couldn't have cross-reacted you couldn't have cross-reacted she couldn't have cross-reacted we couldn't have cross-reacted you couldn't have cross-reacted they couldn't have cross-reacted
V-ing perfect
I couldn't have been cross-reacting you couldn't have been cross-reacting she couldn't have been cross-reacting we couldn't have been cross-reacting you couldn't have been cross-reacting they couldn't have been cross-reacting
Interrogative form
Simple form
could I cross-react? could you cross-react? could she cross-react? could we cross-react? could you cross-react? could they cross-react?
V-ing form
could I be cross-reacting? could you be cross-reacting? could she be cross-reacting? could we be cross-reacting? could you be cross-reacting? could they be cross-reacting?
Perfect
could I have cross-reacted? could you have cross-reacted? could she have cross-reacted? could we have cross-reacted? could you have cross-reacted? could they have cross-reacted?
V-ing perfect
could I have been cross-reacting? could you have been cross-reacting? could she have been cross-reacting? could we have been cross-reacting? could you have been cross-reacting? could they have been cross-reacting?
Interro-negative form
Simple form
couldn't I cross-react? couldn't you cross-react? couldn't she cross-react? couldn't we cross-react? couldn't you cross-react? couldn't they cross-react?
V-ing form
couldn't I be cross-reacting? couldn't you be cross-reacting? couldn't she be cross-reacting? couldn't we be cross-reacting? couldn't you be cross-reacting? couldn't they be cross-reacting?
Perfect
couldn't I have cross-reacted? couldn't you have cross-reacted? couldn't she have cross-reacted? couldn't we have cross-reacted? couldn't you have cross-reacted? couldn't they have cross-reacted?
V-ing perfect
couldn't I have been cross-reacting? couldn't you have been cross-reacting? couldn't she have been cross-reacting? couldn't we have been cross-reacting? couldn't you have been cross-reacting? couldn't they have been cross-reacting?