English verb conjugation COULD STUB

Regular verb: stub - stubbed - stubbed

Affirmation

Simple form

I could stub
you could stub
he could stub
we could stub
you could stub
they could stub

V-ing form

I could be stubbing
you could be stubbing
he could be stubbing
we could be stubbing
you could be stubbing
they could be stubbing

Perfect

I could have stubbed
you could have stubbed
he could have stubbed
we could have stubbed
you could have stubbed
they could have stubbed

V-ing perfect

I could have been stubbing
you could have been stubbing
he could have been stubbing
we could have been stubbing
you could have been stubbing
they could have been stubbing

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

I couldn't have been stubbing
you couldn't have been stubbing
he couldn't have been stubbing
we couldn't have been stubbing
you couldn't have been stubbing
they couldn't have been stubbing

Interrogative form

Simple form

could I stub?
could you stub?
could he stub?
could we stub?
could you stub?
could they stub?

V-ing form

could I be stubbing?
could you be stubbing?
could he be stubbing?
could we be stubbing?
could you be stubbing?
could they be stubbing?

Perfect

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

V-ing perfect

could I have been stubbing?
could you have been stubbing?
could he have been stubbing?
could we have been stubbing?
could you have been stubbing?
could they have been stubbing?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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