English verb conjugation
COULD TIE

Regular verb: tie - tied - tied

Affirmation

Simple form	V-ing form
I could tie you could tie she could tie we could tie you could tie they could tie	I could be tying you could be tying she could be tying we could be tying you could be tying they could be tying
Perfect	V-ing perfect
I could have tied you could have tied she could have tied we could have tied you could have tied they could have tied	I could have been tying you could have been tying she could have been tying we could have been tying you could have been tying they could have been tying

Negation

Simple form	V-ing form
I could not tie you could not tie she could not tie we could not tie you could not tie they could not tie	I could not be tying you could not be tying she could not be tying we could not be tying you could not be tying they could not be tying
Perfect	V-ing perfect
I could not have tied you could not have tied she could not have tied we could not have tied you could not have tied they could not have tied	I could not have been tying you could not have been tying she could not have been tying we could not have been tying you could not have been tying they could not have been tying

Interrogative form

Simple form	V-ing form
could I tie? could you tie? could she tie? could we tie? could you tie? could they tie?	could I be tying? could you be tying? could she be tying? could we be tying? could you be tying? could they be tying?
Perfect	V-ing perfect
could I have tied? could you have tied? could she have tied? could we have tied? could you have tied? could they have tied?	could I have been tying? could you have been tying? could she have been tying? could we have been tying? could you have been tying? could they have been tying?

Interro-negative form

Simple form	V-ing form
could I not tie? could you not tie? could she not tie? could we not tie? could you not tie? could they not tie?	could I not be tying? could you not be tying? could she not be tying? could we not be tying? could you not be tying? could they not be tying?
Perfect	V-ing perfect
could I not have tied? could you not have tied? could she not have tied? could we not have tied? could you not have tied? could they not have tied?	could I not have been tying? could you not have been tying? could she not have been tying? could we not have been tying? could you not have been tying? could they not have been tying?