English verb conjugation
COULD CLAM

Regular verb: clam - clamed - clamed

Affirmation

Simple form	V-ing form
I could clam you could clam he could clam we could clam you could clam they could clam	I could be claming you could be claming he could be claming we could be claming you could be claming they could be claming
Perfect	V-ing perfect
I could have clamed you could have clamed he could have clamed we could have clamed you could have clamed they could have clamed	I could have been claming you could have been claming he could have been claming we could have been claming you could have been claming they could have been claming

Negation

Simple form	V-ing form
I couldn't clam you couldn't clam he couldn't clam we couldn't clam you couldn't clam they couldn't clam	I couldn't be claming you couldn't be claming he couldn't be claming we couldn't be claming you couldn't be claming they couldn't be claming
Perfect	V-ing perfect
I couldn't have clamed you couldn't have clamed he couldn't have clamed we couldn't have clamed you couldn't have clamed they couldn't have clamed	I couldn't have been claming you couldn't have been claming he couldn't have been claming we couldn't have been claming you couldn't have been claming they couldn't have been claming

Interrogative form

Simple form	V-ing form
could I clam? could you clam? could he clam? could we clam? could you clam? could they clam?	could I be claming? could you be claming? could he be claming? could we be claming? could you be claming? could they be claming?
Perfect	V-ing perfect
could I have clamed? could you have clamed? could he have clamed? could we have clamed? could you have clamed? could they have clamed?	could I have been claming? could you have been claming? could he have been claming? could we have been claming? could you have been claming? could they have been claming?

Interro-negative form

Simple form	V-ing form
couldn't I clam? couldn't you clam? couldn't he clam? couldn't we clam? couldn't you clam? couldn't they clam?	couldn't I be claming? couldn't you be claming? couldn't he be claming? couldn't we be claming? couldn't you be claming? couldn't they be claming?
Perfect	V-ing perfect
couldn't I have clamed? couldn't you have clamed? couldn't he have clamed? couldn't we have clamed? couldn't you have clamed? couldn't they have clamed?	couldn't I have been claming? couldn't you have been claming? couldn't he have been claming? couldn't we have been claming? couldn't you have been claming? couldn't they have been claming?