English verb conjugation
COULD PRINT

Regular verb: print - printed - printed

Affirmation

Simple form	V-ing form
I could print you could print he could print we could print you could print they could print	I could be printing you could be printing he could be printing we could be printing you could be printing they could be printing
Perfect	V-ing perfect
I could have printed you could have printed he could have printed we could have printed you could have printed they could have printed	I could have been printing you could have been printing he could have been printing we could have been printing you could have been printing they could have been printing

Negation

Simple form	V-ing form
I could not print you could not print he could not print we could not print you could not print they could not print	I could not be printing you could not be printing he could not be printing we could not be printing you could not be printing they could not be printing
Perfect	V-ing perfect
I could not have printed you could not have printed he could not have printed we could not have printed you could not have printed they could not have printed	I could not have been printing you could not have been printing he could not have been printing we could not have been printing you could not have been printing they could not have been printing

Interrogative form

Simple form	V-ing form
could I print? could you print? could he print? could we print? could you print? could they print?	could I be printing? could you be printing? could he be printing? could we be printing? could you be printing? could they be printing?
Perfect	V-ing perfect
could I have printed? could you have printed? could he have printed? could we have printed? could you have printed? could they have printed?	could I have been printing? could you have been printing? could he have been printing? could we have been printing? could you have been printing? could they have been printing?

Interro-negative form

Simple form	V-ing form
could I not print? could you not print? could he not print? could we not print? could you not print? could they not print?	could I not be printing? could you not be printing? could he not be printing? could we not be printing? could you not be printing? could they not be printing?
Perfect	V-ing perfect
could I not have printed? could you not have printed? could he not have printed? could we not have printed? could you not have printed? could they not have printed?	could I not have been printing? could you not have been printing? could he not have been printing? could we not have been printing? could you not have been printing? could they not have been printing?