English verb conjugation
COULD SYSTEMISE

Regular verb: systemise - systemised - systemised

Affirmation

Simple form	V-ing form
I could systemise you could systemise he could systemise we could systemise you could systemise they could systemise	I could be systemising you could be systemising he could be systemising we could be systemising you could be systemising they could be systemising
Perfect	V-ing perfect
I could have systemised you could have systemised he could have systemised we could have systemised you could have systemised they could have systemised	I could have been systemising you could have been systemising he could have been systemising we could have been systemising you could have been systemising they could have been systemising

Negation

Simple form	V-ing form
I couldn't systemise you couldn't systemise he couldn't systemise we couldn't systemise you couldn't systemise they couldn't systemise	I couldn't be systemising you couldn't be systemising he couldn't be systemising we couldn't be systemising you couldn't be systemising they couldn't be systemising
Perfect	V-ing perfect
I couldn't have systemised you couldn't have systemised he couldn't have systemised we couldn't have systemised you couldn't have systemised they couldn't have systemised	I couldn't have been systemising you couldn't have been systemising he couldn't have been systemising we couldn't have been systemising you couldn't have been systemising they couldn't have been systemising

Interrogative form

Simple form	V-ing form
could I systemise? could you systemise? could he systemise? could we systemise? could you systemise? could they systemise?	could I be systemising? could you be systemising? could he be systemising? could we be systemising? could you be systemising? could they be systemising?
Perfect	V-ing perfect
could I have systemised? could you have systemised? could he have systemised? could we have systemised? could you have systemised? could they have systemised?	could I have been systemising? could you have been systemising? could he have been systemising? could we have been systemising? could you have been systemising? could they have been systemising?

Interro-negative form

Simple form	V-ing form
couldn't I systemise? couldn't you systemise? couldn't he systemise? couldn't we systemise? couldn't you systemise? couldn't they systemise?	couldn't I be systemising? couldn't you be systemising? couldn't he be systemising? couldn't we be systemising? couldn't you be systemising? couldn't they be systemising?
Perfect	V-ing perfect
couldn't I have systemised? couldn't you have systemised? couldn't he have systemised? couldn't we have systemised? couldn't you have systemised? couldn't they have systemised?	couldn't I have been systemising? couldn't you have been systemising? couldn't he have been systemising? couldn't we have been systemising? couldn't you have been systemising? couldn't they have been systemising?