English verb conjugation
COULD ASK

Regular verb: ask - asked - asked

Affirmation

Simple form	V-ing form
I could ask you could ask he could ask we could ask you could ask they could ask	I could be asking you could be asking he could be asking we could be asking you could be asking they could be asking
Perfect	V-ing perfect
I could have asked you could have asked he could have asked we could have asked you could have asked they could have asked	I could have been asking you could have been asking he could have been asking we could have been asking you could have been asking they could have been asking

Negation

Simple form	V-ing form
I couldn't ask you couldn't ask he couldn't ask we couldn't ask you couldn't ask they couldn't ask	I couldn't be asking you couldn't be asking he couldn't be asking we couldn't be asking you couldn't be asking they couldn't be asking
Perfect	V-ing perfect
I couldn't have asked you couldn't have asked he couldn't have asked we couldn't have asked you couldn't have asked they couldn't have asked	I couldn't have been asking you couldn't have been asking he couldn't have been asking we couldn't have been asking you couldn't have been asking they couldn't have been asking

Interrogative form

Simple form	V-ing form
could I ask? could you ask? could he ask? could we ask? could you ask? could they ask?	could I be asking? could you be asking? could he be asking? could we be asking? could you be asking? could they be asking?
Perfect	V-ing perfect
could I have asked? could you have asked? could he have asked? could we have asked? could you have asked? could they have asked?	could I have been asking? could you have been asking? could he have been asking? could we have been asking? could you have been asking? could they have been asking?

Interro-negative form

Simple form	V-ing form
couldn't I ask? couldn't you ask? couldn't he ask? couldn't we ask? couldn't you ask? couldn't they ask?	couldn't I be asking? couldn't you be asking? couldn't he be asking? couldn't we be asking? couldn't you be asking? couldn't they be asking?
Perfect	V-ing perfect
couldn't I have asked? couldn't you have asked? couldn't he have asked? couldn't we have asked? couldn't you have asked? couldn't they have asked?	couldn't I have been asking? couldn't you have been asking? couldn't he have been asking? couldn't we have been asking? couldn't you have been asking? couldn't they have been asking?