English verb conjugation
COULD MUSHROOM

Regular verb: mushroom - mushroomed - mushroomed

Affirmation

Simple form	V-ing form
I could mushroom you could mushroom he could mushroom we could mushroom you could mushroom they could mushroom	I could be mushrooming you could be mushrooming he could be mushrooming we could be mushrooming you could be mushrooming they could be mushrooming
Perfect	V-ing perfect
I could have mushroomed you could have mushroomed he could have mushroomed we could have mushroomed you could have mushroomed they could have mushroomed	I could have been mushrooming you could have been mushrooming he could have been mushrooming we could have been mushrooming you could have been mushrooming they could have been mushrooming

Negation

Simple form	V-ing form
I could not mushroom you could not mushroom he could not mushroom we could not mushroom you could not mushroom they could not mushroom	I could not be mushrooming you could not be mushrooming he could not be mushrooming we could not be mushrooming you could not be mushrooming they could not be mushrooming
Perfect	V-ing perfect
I could not have mushroomed you could not have mushroomed he could not have mushroomed we could not have mushroomed you could not have mushroomed they could not have mushroomed	I could not have been mushrooming you could not have been mushrooming he could not have been mushrooming we could not have been mushrooming you could not have been mushrooming they could not have been mushrooming

Interrogative form

Simple form	V-ing form
could I mushroom? could you mushroom? could he mushroom? could we mushroom? could you mushroom? could they mushroom?	could I be mushrooming? could you be mushrooming? could he be mushrooming? could we be mushrooming? could you be mushrooming? could they be mushrooming?
Perfect	V-ing perfect
could I have mushroomed? could you have mushroomed? could he have mushroomed? could we have mushroomed? could you have mushroomed? could they have mushroomed?	could I have been mushrooming? could you have been mushrooming? could he have been mushrooming? could we have been mushrooming? could you have been mushrooming? could they have been mushrooming?

Interro-negative form

Simple form	V-ing form
could I not mushroom? could you not mushroom? could he not mushroom? could we not mushroom? could you not mushroom? could they not mushroom?	could I not be mushrooming? could you not be mushrooming? could he not be mushrooming? could we not be mushrooming? could you not be mushrooming? could they not be mushrooming?
Perfect	V-ing perfect
could I not have mushroomed? could you not have mushroomed? could he not have mushroomed? could we not have mushroomed? could you not have mushroomed? could they not have mushroomed?	could I not have been mushrooming? could you not have been mushrooming? could he not have been mushrooming? could we not have been mushrooming? could you not have been mushrooming? could they not have been mushrooming?