English verb conjugation
COULD PRESTIMULATE

Regular verb: prestimulate - prestimulated - prestimulated

Affirmation

Simple form	V-ing form
I could prestimulate you could prestimulate he could prestimulate we could prestimulate you could prestimulate they could prestimulate	I could be prestimulating you could be prestimulating he could be prestimulating we could be prestimulating you could be prestimulating they could be prestimulating
Perfect	V-ing perfect
I could have prestimulated you could have prestimulated he could have prestimulated we could have prestimulated you could have prestimulated they could have prestimulated	I could have been prestimulating you could have been prestimulating he could have been prestimulating we could have been prestimulating you could have been prestimulating they could have been prestimulating

Negation

Simple form	V-ing form
I couldn't prestimulate you couldn't prestimulate he couldn't prestimulate we couldn't prestimulate you couldn't prestimulate they couldn't prestimulate	I couldn't be prestimulating you couldn't be prestimulating he couldn't be prestimulating we couldn't be prestimulating you couldn't be prestimulating they couldn't be prestimulating
Perfect	V-ing perfect
I couldn't have prestimulated you couldn't have prestimulated he couldn't have prestimulated we couldn't have prestimulated you couldn't have prestimulated they couldn't have prestimulated	I couldn't have been prestimulating you couldn't have been prestimulating he couldn't have been prestimulating we couldn't have been prestimulating you couldn't have been prestimulating they couldn't have been prestimulating

Interrogative form

Simple form	V-ing form
could I prestimulate? could you prestimulate? could he prestimulate? could we prestimulate? could you prestimulate? could they prestimulate?	could I be prestimulating? could you be prestimulating? could he be prestimulating? could we be prestimulating? could you be prestimulating? could they be prestimulating?
Perfect	V-ing perfect
could I have prestimulated? could you have prestimulated? could he have prestimulated? could we have prestimulated? could you have prestimulated? could they have prestimulated?	could I have been prestimulating? could you have been prestimulating? could he have been prestimulating? could we have been prestimulating? could you have been prestimulating? could they have been prestimulating?

Interro-negative form

Simple form	V-ing form
couldn't I prestimulate? couldn't you prestimulate? couldn't he prestimulate? couldn't we prestimulate? couldn't you prestimulate? couldn't they prestimulate?	couldn't I be prestimulating? couldn't you be prestimulating? couldn't he be prestimulating? couldn't we be prestimulating? couldn't you be prestimulating? couldn't they be prestimulating?
Perfect	V-ing perfect
couldn't I have prestimulated? couldn't you have prestimulated? couldn't he have prestimulated? couldn't we have prestimulated? couldn't you have prestimulated? couldn't they have prestimulated?	couldn't I have been prestimulating? couldn't you have been prestimulating? couldn't he have been prestimulating? couldn't we have been prestimulating? couldn't you have been prestimulating? couldn't they have been prestimulating?