English verb conjugation
COULD TRAWL

Regular verb: trawl - trawled - trawled

Affirmation

Simple form	V-ing form
I could trawl you could trawl he could trawl we could trawl you could trawl they could trawl	I could be trawling you could be trawling he could be trawling we could be trawling you could be trawling they could be trawling
Perfect	V-ing perfect
I could have trawled you could have trawled he could have trawled we could have trawled you could have trawled they could have trawled	I could have been trawling you could have been trawling he could have been trawling we could have been trawling you could have been trawling they could have been trawling

Negation

Simple form	V-ing form
I couldn't trawl you couldn't trawl he couldn't trawl we couldn't trawl you couldn't trawl they couldn't trawl	I couldn't be trawling you couldn't be trawling he couldn't be trawling we couldn't be trawling you couldn't be trawling they couldn't be trawling
Perfect	V-ing perfect
I couldn't have trawled you couldn't have trawled he couldn't have trawled we couldn't have trawled you couldn't have trawled they couldn't have trawled	I couldn't have been trawling you couldn't have been trawling he couldn't have been trawling we couldn't have been trawling you couldn't have been trawling they couldn't have been trawling

Interrogative form

Simple form	V-ing form
could I trawl? could you trawl? could he trawl? could we trawl? could you trawl? could they trawl?	could I be trawling? could you be trawling? could he be trawling? could we be trawling? could you be trawling? could they be trawling?
Perfect	V-ing perfect
could I have trawled? could you have trawled? could he have trawled? could we have trawled? could you have trawled? could they have trawled?	could I have been trawling? could you have been trawling? could he have been trawling? could we have been trawling? could you have been trawling? could they have been trawling?

Interro-negative form

Simple form	V-ing form
couldn't I trawl? couldn't you trawl? couldn't he trawl? couldn't we trawl? couldn't you trawl? couldn't they trawl?	couldn't I be trawling? couldn't you be trawling? couldn't he be trawling? couldn't we be trawling? couldn't you be trawling? couldn't they be trawling?
Perfect	V-ing perfect
couldn't I have trawled? couldn't you have trawled? couldn't he have trawled? couldn't we have trawled? couldn't you have trawled? couldn't they have trawled?	couldn't I have been trawling? couldn't you have been trawling? couldn't he have been trawling? couldn't we have been trawling? couldn't you have been trawling? couldn't they have been trawling?