English verb conjugation
COULD UNDERTAKE

Irregular verb: undertake - undertook - undertaken

Affirmation

Simple form	V-ing form
I could undertake you could undertake she could undertake we could undertake you could undertake they could undertake	I could be undertaking you could be undertaking she 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 she 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 she 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 couldn't undertake you couldn't undertake she couldn't undertake we couldn't undertake you couldn't undertake they couldn't undertake	I couldn't be undertaking you couldn't be undertaking she couldn't be undertaking we couldn't be undertaking you couldn't be undertaking they couldn't be undertaking
Perfect	V-ing perfect
I couldn't have undertaken you couldn't have undertaken she couldn't have undertaken we couldn't have undertaken you couldn't have undertaken they couldn't have undertaken	I couldn't have been undertaking you couldn't have been undertaking she couldn't have been undertaking we couldn't have been undertaking you couldn't have been undertaking they couldn't have been undertaking

Interrogative form

Simple form	V-ing form
could I undertake? could you undertake? could she undertake? could we undertake? could you undertake? could they undertake?	could I be undertaking? could you be undertaking? could she 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 she 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 she 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
couldn't I undertake? couldn't you undertake? couldn't she undertake? couldn't we undertake? couldn't you undertake? couldn't they undertake?	couldn't I be undertaking? couldn't you be undertaking? couldn't she be undertaking? couldn't we be undertaking? couldn't you be undertaking? couldn't they be undertaking?
Perfect	V-ing perfect
couldn't I have undertaken? couldn't you have undertaken? couldn't she have undertaken? couldn't we have undertaken? couldn't you have undertaken? couldn't they have undertaken?	couldn't I have been undertaking? couldn't you have been undertaking? couldn't she have been undertaking? couldn't we have been undertaking? couldn't you have been undertaking? couldn't they have been undertaking?