English verb conjugation
COULD UNDERTAKE

Irregular verb: undertake - undertook - undertaken

Affirmation

Simple form	V-ing form
I could undertake you could undertake he could undertake we could undertake you could undertake they could undertake	I could be undertaking you could be undertaking he could be undertaking we could be undertaking you could be undertaking they could be undertaking
Perfect	V-ing perfect
I could have undertaken you could have undertaken he could have undertaken we could have undertaken you could have undertaken they could have undertaken	I could have been undertaking you could have been undertaking he could have been undertaking we could have been undertaking you could have been undertaking they could have been undertaking

Negation

Simple form	V-ing form
I could not undertake you could not undertake he could not undertake we could not undertake you could not undertake they could not undertake	I could not be undertaking you could not be undertaking he could not be undertaking we could not be undertaking you could not be undertaking they could not be undertaking
Perfect	V-ing perfect
I could not have undertaken you could not have undertaken he could not have undertaken we could not have undertaken you could not have undertaken they could not have undertaken	I could not have been undertaking you could not have been undertaking he could not have been undertaking we could not have been undertaking you could not have been undertaking they could not have been undertaking

Interrogative form

Simple form	V-ing form
could I undertake? could you undertake? could he undertake? could we undertake? could you undertake? could they undertake?	could I be undertaking? could you be undertaking? could he be undertaking? could we be undertaking? could you be undertaking? could they be undertaking?
Perfect	V-ing perfect
could I have undertaken? could you have undertaken? could he have undertaken? could we have undertaken? could you have undertaken? could they have undertaken?	could I have been undertaking? could you have been undertaking? could he have been undertaking? could we have been undertaking? could you have been undertaking? could they have been undertaking?

Interro-negative form

Simple form	V-ing form
could I not undertake? could you not undertake? could he not undertake? could we not undertake? could you not undertake? could they not undertake?	could I not be undertaking? could you not be undertaking? could he not be undertaking? could we not be undertaking? could you not be undertaking? could they not be undertaking?
Perfect	V-ing perfect
could I not have undertaken? could you not have undertaken? could he not have undertaken? could we not have undertaken? could you not have undertaken? could they not have undertaken?	could I not have been undertaking? could you not have been undertaking? could he not have been undertaking? could we not have been undertaking? could you not have been undertaking? could they not have been undertaking?