English verb conjugation
COULD MANIPULATE

Regular verb: manipulate - manipulated - manipulated

Affirmation

Simple form	V-ing form
I could manipulate you could manipulate she could manipulate we could manipulate you could manipulate they could manipulate	I could be manipulating you could be manipulating she could be manipulating we could be manipulating you could be manipulating they could be manipulating
Perfect	V-ing perfect
I could have manipulated you could have manipulated she could have manipulated we could have manipulated you could have manipulated they could have manipulated	I could have been manipulating you could have been manipulating she could have been manipulating we could have been manipulating you could have been manipulating they could have been manipulating

Negation

Simple form	V-ing form
I couldn't manipulate you couldn't manipulate she couldn't manipulate we couldn't manipulate you couldn't manipulate they couldn't manipulate	I couldn't be manipulating you couldn't be manipulating she couldn't be manipulating we couldn't be manipulating you couldn't be manipulating they couldn't be manipulating
Perfect	V-ing perfect
I couldn't have manipulated you couldn't have manipulated she couldn't have manipulated we couldn't have manipulated you couldn't have manipulated they couldn't have manipulated	I couldn't have been manipulating you couldn't have been manipulating she couldn't have been manipulating we couldn't have been manipulating you couldn't have been manipulating they couldn't have been manipulating

Interrogative form

Simple form	V-ing form
could I manipulate? could you manipulate? could she manipulate? could we manipulate? could you manipulate? could they manipulate?	could I be manipulating? could you be manipulating? could she be manipulating? could we be manipulating? could you be manipulating? could they be manipulating?
Perfect	V-ing perfect
could I have manipulated? could you have manipulated? could she have manipulated? could we have manipulated? could you have manipulated? could they have manipulated?	could I have been manipulating? could you have been manipulating? could she have been manipulating? could we have been manipulating? could you have been manipulating? could they have been manipulating?

Interro-negative form

Simple form	V-ing form
couldn't I manipulate? couldn't you manipulate? couldn't she manipulate? couldn't we manipulate? couldn't you manipulate? couldn't they manipulate?	couldn't I be manipulating? couldn't you be manipulating? couldn't she be manipulating? couldn't we be manipulating? couldn't you be manipulating? couldn't they be manipulating?
Perfect	V-ing perfect
couldn't I have manipulated? couldn't you have manipulated? couldn't she have manipulated? couldn't we have manipulated? couldn't you have manipulated? couldn't they have manipulated?	couldn't I have been manipulating? couldn't you have been manipulating? couldn't she have been manipulating? couldn't we have been manipulating? couldn't you have been manipulating? couldn't they have been manipulating?