English verb conjugation
COULD SHAKE

Irregular verb: shake - shook - shaken

Affirmation

Simple form	V-ing form
I could shake you could shake he could shake we could shake you could shake they could shake	I could be shaking you could be shaking he could be shaking we could be shaking you could be shaking they could be shaking
Perfect	V-ing perfect
I could have shaken you could have shaken he could have shaken we could have shaken you could have shaken they could have shaken	I could have been shaking you could have been shaking he could have been shaking we could have been shaking you could have been shaking they could have been shaking

Negation

Simple form	V-ing form
I couldn't shake you couldn't shake he couldn't shake we couldn't shake you couldn't shake they couldn't shake	I couldn't be shaking you couldn't be shaking he couldn't be shaking we couldn't be shaking you couldn't be shaking they couldn't be shaking
Perfect	V-ing perfect
I couldn't have shaken you couldn't have shaken he couldn't have shaken we couldn't have shaken you couldn't have shaken they couldn't have shaken	I couldn't have been shaking you couldn't have been shaking he couldn't have been shaking we couldn't have been shaking you couldn't have been shaking they couldn't have been shaking

Interrogative form

Simple form	V-ing form
could I shake? could you shake? could he shake? could we shake? could you shake? could they shake?	could I be shaking? could you be shaking? could he be shaking? could we be shaking? could you be shaking? could they be shaking?
Perfect	V-ing perfect
could I have shaken? could you have shaken? could he have shaken? could we have shaken? could you have shaken? could they have shaken?	could I have been shaking? could you have been shaking? could he have been shaking? could we have been shaking? could you have been shaking? could they have been shaking?

Interro-negative form

Simple form	V-ing form
couldn't I shake? couldn't you shake? couldn't he shake? couldn't we shake? couldn't you shake? couldn't they shake?	couldn't I be shaking? couldn't you be shaking? couldn't he be shaking? couldn't we be shaking? couldn't you be shaking? couldn't they be shaking?
Perfect	V-ing perfect
couldn't I have shaken? couldn't you have shaken? couldn't he have shaken? couldn't we have shaken? couldn't you have shaken? couldn't they have shaken?	couldn't I have been shaking? couldn't you have been shaking? couldn't he have been shaking? couldn't we have been shaking? couldn't you have been shaking? couldn't they have been shaking?