English verb conjugation COULD SYSTEMATISE

Regular verb: systematise - systematised - systematised

Affirmation

Simple form

I could systematise
you could systematise
he could systematise
we could systematise
you could systematise
they could systematise

V-ing form

I could be systematising
you could be systematising
he could be systematising
we could be systematising
you could be systematising
they could be systematising

Perfect

I could have systematised
you could have systematised
he could have systematised
we could have systematised
you could have systematised
they could have systematised

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I systematise?
could you systematise?
could he systematise?
could we systematise?
could you systematise?
could they systematise?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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