English verb conjugation COULD UNDERTAKE

Irregular verb: undertake - undertook - undertaken

Affirmation

Simple form

I could undertake
you could undertake
he could undertake
we could undertake
you could undertake
they could undertake

V-ing form

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

I could have undertaken
you could have undertaken
he could have undertaken
we could have undertaken
you could have undertaken
they could have undertaken

V-ing perfect

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

I couldn't undertake
you couldn't undertake
he couldn't undertake
we couldn't undertake
you couldn't undertake
they couldn't undertake

V-ing form

I couldn't be undertaking
you couldn't be undertaking
he couldn't be undertaking
we couldn't be undertaking
you couldn't be undertaking
they couldn't be undertaking

Perfect

I couldn't have undertaken
you couldn't have undertaken
he couldn't have undertaken
we couldn't have undertaken
you couldn't have undertaken
they couldn't have undertaken

V-ing perfect

I couldn't have been undertaking
you couldn't have been undertaking
he 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

could I undertake?
could you undertake?
could he undertake?
could we undertake?
could you undertake?
could they undertake?

V-ing form

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

could I have undertaken?
could you have undertaken?
could he have undertaken?
could we have undertaken?
could you have undertaken?
could they have undertaken?

V-ing perfect

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

couldn't I undertake?
couldn't you undertake?
couldn't he undertake?
couldn't we undertake?
couldn't you undertake?
couldn't they undertake?

V-ing form

couldn't I be undertaking?
couldn't you be undertaking?
couldn't he be undertaking?
couldn't we be undertaking?
couldn't you be undertaking?
couldn't they be undertaking?

Perfect

couldn't I have undertaken?
couldn't you have undertaken?
couldn't he have undertaken?
couldn't we have undertaken?
couldn't you have undertaken?
couldn't they have undertaken?

V-ing perfect

couldn't I have been undertaking?
couldn't you have been undertaking?
couldn't he have been undertaking?
couldn't we have been undertaking?
couldn't you have been undertaking?
couldn't they have been undertaking?

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