English verb conjugation
COULD SKID

Regular verb: skid - skidded - skidded

Affirmation

Simple form	V-ing form
I could skid you could skid he could skid we could skid you could skid they could skid	I could be skidding you could be skidding he could be skidding we could be skidding you could be skidding they could be skidding
Perfect	V-ing perfect
I could have skidded you could have skidded he could have skidded we could have skidded you could have skidded they could have skidded	I could have been skidding you could have been skidding he could have been skidding we could have been skidding you could have been skidding they could have been skidding

Negation

Simple form	V-ing form
I couldn't skid you couldn't skid he couldn't skid we couldn't skid you couldn't skid they couldn't skid	I couldn't be skidding you couldn't be skidding he couldn't be skidding we couldn't be skidding you couldn't be skidding they couldn't be skidding
Perfect	V-ing perfect
I couldn't have skidded you couldn't have skidded he couldn't have skidded we couldn't have skidded you couldn't have skidded they couldn't have skidded	I couldn't have been skidding you couldn't have been skidding he couldn't have been skidding we couldn't have been skidding you couldn't have been skidding they couldn't have been skidding

Interrogative form

Simple form	V-ing form
could I skid? could you skid? could he skid? could we skid? could you skid? could they skid?	could I be skidding? could you be skidding? could he be skidding? could we be skidding? could you be skidding? could they be skidding?
Perfect	V-ing perfect
could I have skidded? could you have skidded? could he have skidded? could we have skidded? could you have skidded? could they have skidded?	could I have been skidding? could you have been skidding? could he have been skidding? could we have been skidding? could you have been skidding? could they have been skidding?

Interro-negative form

Simple form	V-ing form
couldn't I skid? couldn't you skid? couldn't he skid? couldn't we skid? couldn't you skid? couldn't they skid?	couldn't I be skidding? couldn't you be skidding? couldn't he be skidding? couldn't we be skidding? couldn't you be skidding? couldn't they be skidding?
Perfect	V-ing perfect
couldn't I have skidded? couldn't you have skidded? couldn't he have skidded? couldn't we have skidded? couldn't you have skidded? couldn't they have skidded?	couldn't I have been skidding? couldn't you have been skidding? couldn't he have been skidding? couldn't we have been skidding? couldn't you have been skidding? couldn't they have been skidding?