English verb conjugation
COULD TURBOCHARGE

Regular verb: turbocharge - turbocharged - turbocharged

Affirmation

Simple form	V-ing form
I could turbocharge you could turbocharge she could turbocharge we could turbocharge you could turbocharge they could turbocharge	I could be turbocharging you could be turbocharging she could be turbocharging we could be turbocharging you could be turbocharging they could be turbocharging
Perfect	V-ing perfect
I could have turbocharged you could have turbocharged she could have turbocharged we could have turbocharged you could have turbocharged they could have turbocharged	I could have been turbocharging you could have been turbocharging she could have been turbocharging we could have been turbocharging you could have been turbocharging they could have been turbocharging

Negation

Simple form	V-ing form
I couldn't turbocharge you couldn't turbocharge she couldn't turbocharge we couldn't turbocharge you couldn't turbocharge they couldn't turbocharge	I couldn't be turbocharging you couldn't be turbocharging she couldn't be turbocharging we couldn't be turbocharging you couldn't be turbocharging they couldn't be turbocharging
Perfect	V-ing perfect
I couldn't have turbocharged you couldn't have turbocharged she couldn't have turbocharged we couldn't have turbocharged you couldn't have turbocharged they couldn't have turbocharged	I couldn't have been turbocharging you couldn't have been turbocharging she couldn't have been turbocharging we couldn't have been turbocharging you couldn't have been turbocharging they couldn't have been turbocharging

Interrogative form

Simple form	V-ing form
could I turbocharge? could you turbocharge? could she turbocharge? could we turbocharge? could you turbocharge? could they turbocharge?	could I be turbocharging? could you be turbocharging? could she be turbocharging? could we be turbocharging? could you be turbocharging? could they be turbocharging?
Perfect	V-ing perfect
could I have turbocharged? could you have turbocharged? could she have turbocharged? could we have turbocharged? could you have turbocharged? could they have turbocharged?	could I have been turbocharging? could you have been turbocharging? could she have been turbocharging? could we have been turbocharging? could you have been turbocharging? could they have been turbocharging?

Interro-negative form

Simple form	V-ing form
couldn't I turbocharge? couldn't you turbocharge? couldn't she turbocharge? couldn't we turbocharge? couldn't you turbocharge? couldn't they turbocharge?	couldn't I be turbocharging? couldn't you be turbocharging? couldn't she be turbocharging? couldn't we be turbocharging? couldn't you be turbocharging? couldn't they be turbocharging?
Perfect	V-ing perfect
couldn't I have turbocharged? couldn't you have turbocharged? couldn't she have turbocharged? couldn't we have turbocharged? couldn't you have turbocharged? couldn't they have turbocharged?	couldn't I have been turbocharging? couldn't you have been turbocharging? couldn't she have been turbocharging? couldn't we have been turbocharging? couldn't you have been turbocharging? couldn't they have been turbocharging?