could mushroom
Regular verb: mushroom - mushroomed- mushroomed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mushroom
you could mushroom
she could mushroom
we could mushroom
you could mushroom
they could mushroom 	I could be mushrooming
you could be mushrooming
she could be mushrooming
we could be mushrooming
you could be mushrooming
they could be mushrooming	I could have mushroomed
you could have mushroomed
she 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
she 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 	Perfect 	V-ing perfect 	
I couldn't mushroom
you couldn't mushroom
she 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
she couldn't be mushrooming
we couldn't be mushrooming
you couldn't be mushrooming
they couldn't be mushrooming	I couldn't have mushroomed
you couldn't have mushroomed
she 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
she 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 	Perfect 	V-ing perfect 	
could I mushroom?
could you mushroom?
could she mushroom?
could we mushroom?
could you mushroom?
could they mushroom? 	could I be mushrooming?
could you be mushrooming?
could she be mushrooming?
could we be mushrooming?
could you be mushrooming?
could they be mushrooming? 	could I have mushroomed?
could you have mushroomed?
could she 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 she 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 	Perfect 	V-ing perfect 	
couldn't I mushroom?
couldn't you mushroom?
couldn't she 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 she be mushrooming?
couldn't we be mushrooming?
couldn't you be mushrooming?
couldn't they be mushrooming? 	couldn't I have mushroomed?
couldn't you have mushroomed?
couldn't she 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 she have been mushrooming?
couldn't we have been mushrooming?
couldn't you have been mushrooming?
couldn't they have been mushrooming?