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 could not clam you could not clam he could not clam we could not clam you could not clam they could not clam	I could not be claming you could not be claming he could not be claming we could not be claming you could not be claming they could not be claming
Perfect	V-ing perfect
I could not have clamed you could not have clamed he could not have clamed we could not have clamed you could not have clamed they could not have clamed	I could not have been claming you could not have been claming he could not have been claming we could not have been claming you could not have been claming they could not 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
could I not clam? could you not clam? could he not clam? could we not clam? could you not clam? could they not clam?	could I not be claming? could you not be claming? could he not be claming? could we not be claming? could you not be claming? could they not be claming?
Perfect	V-ing perfect
could I not have clamed? could you not have clamed? could he not have clamed? could we not have clamed? could you not have clamed? could they not have clamed?	could I not have been claming? could you not have been claming? could he not have been claming? could we not have been claming? could you not have been claming? could they not have been claming?