English verb conjugation
CAN UNTIE

Regular verb: untie - untied - untied

Affirmation

Simple form	V-ing form
I can untie you can untie she can untie we can untie you can untie they can untie	I can be untying you can be untying she can be untying we can be untying you can be untying they can be untying
Perfect	V-ing perfect
I can have untied you can have untied she can have untied we can have untied you can have untied they can have untied	I can have been untying you can have been untying she can have been untying we can have been untying you can have been untying they can have been untying

Negation

Simple form	V-ing form
I cannot untie you cannot untie she cannot untie we cannot untie you cannot untie they cannot untie	I cannot be untying you cannot be untying she cannot be untying we cannot be untying you cannot be untying they cannot be untying
Perfect	V-ing perfect
I cannot have untied you cannot have untied she cannot have untied we cannot have untied you cannot have untied they cannot have untied	I cannot have been untying you cannot have been untying she cannot have been untying we cannot have been untying you cannot have been untying they cannot have been untying

Interrogative form

Simple form	V-ing form
can I untie? can you untie? can she untie? can we untie? can you untie? can they untie?	can I be untying? can you be untying? can she be untying? can we be untying? can you be untying? can they be untying?
Perfect	V-ing perfect
can I have untied? can you have untied? can she have untied? can we have untied? can you have untied? can they have untied?	can I have been untying? can you have been untying? can she have been untying? can we have been untying? can you have been untying? can they have been untying?

Interro-negative form

Simple form	V-ing form
can I not untie? can you not untie? can she not untie? can we not untie? can you not untie? can they not untie?	can I not be untying? can you not be untying? can she not be untying? can we not be untying? can you not be untying? can they not be untying?
Perfect	V-ing perfect
can I not have untied? can you not have untied? can she not have untied? can we not have untied? can you not have untied? can they not have untied?	can I not have been untying? can you not have been untying? can she not have been untying? can we not have been untying? can you not have been untying? can they not have been untying?