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 couldn't mushroom you couldn't mushroom he couldn't mushroom we couldn't mushroom you couldn't mushroom they couldn't mushroom	I couldn't be mushrooming you couldn't be mushrooming he couldn't be mushrooming we couldn't be mushrooming you couldn't be mushrooming they couldn't be mushrooming
Perfect	V-ing perfect
I couldn't have mushroomed you couldn't have mushroomed he couldn't have mushroomed we couldn't have mushroomed you couldn't have mushroomed they couldn't have mushroomed	I couldn't have been mushrooming you couldn't have been mushrooming he couldn't have been mushrooming we couldn't have been mushrooming you couldn't have been mushrooming they couldn't 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
couldn't I mushroom? couldn't you mushroom? couldn't he mushroom? couldn't we mushroom? couldn't you mushroom? couldn't they mushroom?	couldn't I be mushrooming? couldn't you be mushrooming? couldn't he be mushrooming? couldn't we be mushrooming? couldn't you be mushrooming? couldn't they be mushrooming?
Perfect	V-ing perfect
couldn't I have mushroomed? couldn't you have mushroomed? couldn't he have mushroomed? couldn't we have mushroomed? couldn't you have mushroomed? couldn't they have mushroomed?	couldn't I have been mushrooming? couldn't you have been mushrooming? couldn't he have been mushrooming? couldn't we have been mushrooming? couldn't you have been mushrooming? couldn't they have been mushrooming?