English verb conjugation
COULD CROSS-TRAIN

Regular verb: cross-train - cross-trained - cross-trained

Affirmation

Simple form	V-ing form
I could cross-train you could cross-train she could cross-train we could cross-train you could cross-train they could cross-train	I could be cross-training you could be cross-training she could be cross-training we could be cross-training you could be cross-training they could be cross-training
Perfect	V-ing perfect
I could have cross-trained you could have cross-trained she could have cross-trained we could have cross-trained you could have cross-trained they could have cross-trained	I could have been cross-training you could have been cross-training she could have been cross-training we could have been cross-training you could have been cross-training they could have been cross-training

Negation

Simple form	V-ing form
I couldn't cross-train you couldn't cross-train she couldn't cross-train we couldn't cross-train you couldn't cross-train they couldn't cross-train	I couldn't be cross-training you couldn't be cross-training she couldn't be cross-training we couldn't be cross-training you couldn't be cross-training they couldn't be cross-training
Perfect	V-ing perfect
I couldn't have cross-trained you couldn't have cross-trained she couldn't have cross-trained we couldn't have cross-trained you couldn't have cross-trained they couldn't have cross-trained	I couldn't have been cross-training you couldn't have been cross-training she couldn't have been cross-training we couldn't have been cross-training you couldn't have been cross-training they couldn't have been cross-training

Interrogative form

Simple form	V-ing form
could I cross-train? could you cross-train? could she cross-train? could we cross-train? could you cross-train? could they cross-train?	could I be cross-training? could you be cross-training? could she be cross-training? could we be cross-training? could you be cross-training? could they be cross-training?
Perfect	V-ing perfect
could I have cross-trained? could you have cross-trained? could she have cross-trained? could we have cross-trained? could you have cross-trained? could they have cross-trained?	could I have been cross-training? could you have been cross-training? could she have been cross-training? could we have been cross-training? could you have been cross-training? could they have been cross-training?

Interro-negative form

Simple form	V-ing form
couldn't I cross-train? couldn't you cross-train? couldn't she cross-train? couldn't we cross-train? couldn't you cross-train? couldn't they cross-train?	couldn't I be cross-training? couldn't you be cross-training? couldn't she be cross-training? couldn't we be cross-training? couldn't you be cross-training? couldn't they be cross-training?
Perfect	V-ing perfect
couldn't I have cross-trained? couldn't you have cross-trained? couldn't she have cross-trained? couldn't we have cross-trained? couldn't you have cross-trained? couldn't they have cross-trained?	couldn't I have been cross-training? couldn't you have been cross-training? couldn't she have been cross-training? couldn't we have been cross-training? couldn't you have been cross-training? couldn't they have been cross-training?