English verb conjugation COULD BACKSTROKE

Regular verb: backstroke - backstroked - backstroked

Affirmation

Simple form

I could backstroke
you could backstroke
he could backstroke
we could backstroke
you could backstroke
they could backstroke

V-ing form

I could be backstroking
you could be backstroking
he could be backstroking
we could be backstroking
you could be backstroking
they could be backstroking

Perfect

I could have backstroked
you could have backstroked
he could have backstroked
we could have backstroked
you could have backstroked
they could have backstroked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I backstroke?
could you backstroke?
could he backstroke?
could we backstroke?
could you backstroke?
could they backstroke?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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