could trawl
Regular verb: trawl - trawled- trawled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?