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 couldn't print you couldn't print he couldn't print we couldn't print you couldn't print they couldn't print	I couldn't be printing you couldn't be printing he couldn't be printing we couldn't be printing you couldn't be printing they couldn't be printing
Perfect	V-ing perfect
I couldn't have printed you couldn't have printed he couldn't have printed we couldn't have printed you couldn't have printed they couldn't have printed	I couldn't have been printing you couldn't have been printing he couldn't have been printing we couldn't have been printing you couldn't have been printing they couldn't 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
couldn't I print? couldn't you print? couldn't he print? couldn't we print? couldn't you print? couldn't they print?	couldn't I be printing? couldn't you be printing? couldn't he be printing? couldn't we be printing? couldn't you be printing? couldn't they be printing?
Perfect	V-ing perfect
couldn't I have printed? couldn't you have printed? couldn't he have printed? couldn't we have printed? couldn't you have printed? couldn't they have printed?	couldn't I have been printing? couldn't you have been printing? couldn't he have been printing? couldn't we have been printing? couldn't you have been printing? couldn't they have been printing?