English verb conjugation COULD HUM

Regular verb: hum - humed - humed

Affirmation

Simple form

I could hum
you could hum
he could hum
we could hum
you could hum
they could hum

V-ing form

I could be huming
you could be huming
he could be huming
we could be huming
you could be huming
they could be huming

Perfect

I could have humed
you could have humed
he could have humed
we could have humed
you could have humed
they could have humed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I hum?
could you hum?
could he hum?
could we hum?
could you hum?
could they hum?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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