English verb conjugation
COULD SPEARFISH

Regular verb: spearfish - spearfished - spearfished

Affirmation

Simple form	V-ing form
I could spearfish you could spearfish she could spearfish we could spearfish you could spearfish they could spearfish	I could be spearfishing you could be spearfishing she could be spearfishing we could be spearfishing you could be spearfishing they could be spearfishing
Perfect	V-ing perfect
I could have spearfished you could have spearfished she could have spearfished we could have spearfished you could have spearfished they could have spearfished	I could have been spearfishing you could have been spearfishing she could have been spearfishing we could have been spearfishing you could have been spearfishing they could have been spearfishing

Negation

Simple form	V-ing form
I couldn't spearfish you couldn't spearfish she couldn't spearfish we couldn't spearfish you couldn't spearfish they couldn't spearfish	I couldn't be spearfishing you couldn't be spearfishing she couldn't be spearfishing we couldn't be spearfishing you couldn't be spearfishing they couldn't be spearfishing
Perfect	V-ing perfect
I couldn't have spearfished you couldn't have spearfished she couldn't have spearfished we couldn't have spearfished you couldn't have spearfished they couldn't have spearfished	I couldn't have been spearfishing you couldn't have been spearfishing she couldn't have been spearfishing we couldn't have been spearfishing you couldn't have been spearfishing they couldn't have been spearfishing

Interrogative form

Simple form	V-ing form
could I spearfish? could you spearfish? could she spearfish? could we spearfish? could you spearfish? could they spearfish?	could I be spearfishing? could you be spearfishing? could she be spearfishing? could we be spearfishing? could you be spearfishing? could they be spearfishing?
Perfect	V-ing perfect
could I have spearfished? could you have spearfished? could she have spearfished? could we have spearfished? could you have spearfished? could they have spearfished?	could I have been spearfishing? could you have been spearfishing? could she have been spearfishing? could we have been spearfishing? could you have been spearfishing? could they have been spearfishing?

Interro-negative form

Simple form	V-ing form
couldn't I spearfish? couldn't you spearfish? couldn't she spearfish? couldn't we spearfish? couldn't you spearfish? couldn't they spearfish?	couldn't I be spearfishing? couldn't you be spearfishing? couldn't she be spearfishing? couldn't we be spearfishing? couldn't you be spearfishing? couldn't they be spearfishing?
Perfect	V-ing perfect
couldn't I have spearfished? couldn't you have spearfished? couldn't she have spearfished? couldn't we have spearfished? couldn't you have spearfished? couldn't they have spearfished?	couldn't I have been spearfishing? couldn't you have been spearfishing? couldn't she have been spearfishing? couldn't we have been spearfishing? couldn't you have been spearfishing? couldn't they have been spearfishing?