English verb conjugation
COULD SURPRISE

Regular verb: surprise - surprised - surprised

Affirmation

Simple form	V-ing form
I could surprise you could surprise he could surprise we could surprise you could surprise they could surprise	I could be surprising you could be surprising he could be surprising we could be surprising you could be surprising they could be surprising
Perfect	V-ing perfect
I could have surprised you could have surprised he could have surprised we could have surprised you could have surprised they could have surprised	I could have been surprising you could have been surprising he could have been surprising we could have been surprising you could have been surprising they could have been surprising

Negation

Simple form	V-ing form
I couldn't surprise you couldn't surprise he couldn't surprise we couldn't surprise you couldn't surprise they couldn't surprise	I couldn't be surprising you couldn't be surprising he couldn't be surprising we couldn't be surprising you couldn't be surprising they couldn't be surprising
Perfect	V-ing perfect
I couldn't have surprised you couldn't have surprised he couldn't have surprised we couldn't have surprised you couldn't have surprised they couldn't have surprised	I couldn't have been surprising you couldn't have been surprising he couldn't have been surprising we couldn't have been surprising you couldn't have been surprising they couldn't have been surprising

Interrogative form

Simple form	V-ing form
could I surprise? could you surprise? could he surprise? could we surprise? could you surprise? could they surprise?	could I be surprising? could you be surprising? could he be surprising? could we be surprising? could you be surprising? could they be surprising?
Perfect	V-ing perfect
could I have surprised? could you have surprised? could he have surprised? could we have surprised? could you have surprised? could they have surprised?	could I have been surprising? could you have been surprising? could he have been surprising? could we have been surprising? could you have been surprising? could they have been surprising?

Interro-negative form

Simple form	V-ing form
couldn't I surprise? couldn't you surprise? couldn't he surprise? couldn't we surprise? couldn't you surprise? couldn't they surprise?	couldn't I be surprising? couldn't you be surprising? couldn't he be surprising? couldn't we be surprising? couldn't you be surprising? couldn't they be surprising?
Perfect	V-ing perfect
couldn't I have surprised? couldn't you have surprised? couldn't he have surprised? couldn't we have surprised? couldn't you have surprised? couldn't they have surprised?	couldn't I have been surprising? couldn't you have been surprising? couldn't he have been surprising? couldn't we have been surprising? couldn't you have been surprising? couldn't they have been surprising?