English verb conjugation
COULD CROSS

Regular verb: cross - crossed - crossed

Affirmation

Simple form	V-ing form
I could cross you could cross he could cross we could cross you could cross they could cross	I could be crossing you could be crossing he could be crossing we could be crossing you could be crossing they could be crossing
Perfect	V-ing perfect
I could have crossed you could have crossed he could have crossed we could have crossed you could have crossed they could have crossed	I could have been crossing you could have been crossing he could have been crossing we could have been crossing you could have been crossing they could have been crossing

Negation

Simple form	V-ing form
I couldn't cross you couldn't cross he couldn't cross we couldn't cross you couldn't cross they couldn't cross	I couldn't be crossing you couldn't be crossing he couldn't be crossing we couldn't be crossing you couldn't be crossing they couldn't be crossing
Perfect	V-ing perfect
I couldn't have crossed you couldn't have crossed he couldn't have crossed we couldn't have crossed you couldn't have crossed they couldn't have crossed	I couldn't have been crossing you couldn't have been crossing he couldn't have been crossing we couldn't have been crossing you couldn't have been crossing they couldn't have been crossing

Interrogative form

Simple form	V-ing form
could I cross? could you cross? could he cross? could we cross? could you cross? could they cross?	could I be crossing? could you be crossing? could he be crossing? could we be crossing? could you be crossing? could they be crossing?
Perfect	V-ing perfect
could I have crossed? could you have crossed? could he have crossed? could we have crossed? could you have crossed? could they have crossed?	could I have been crossing? could you have been crossing? could he have been crossing? could we have been crossing? could you have been crossing? could they have been crossing?

Interro-negative form

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