could dwindle
Regular verb: dwindle - dwindled- dwindled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dwindle
you could dwindle
he could dwindle
we could dwindle
you could dwindle
they could dwindle 	I could be dwindling
you could be dwindling
he could be dwindling
we could be dwindling
you could be dwindling
they could be dwindling	I could have dwindled
you could have dwindled
he could have dwindled
we could have dwindled
you could have dwindled
they could have dwindled	I could have been dwindling
you could have been dwindling
he could have been dwindling
we could have been dwindling
you could have been dwindling
they could have been dwindling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't dwindle
you couldn't dwindle
he couldn't dwindle
we couldn't dwindle
you couldn't dwindle
they couldn't dwindle 	I couldn't be dwindling
you couldn't be dwindling
he couldn't be dwindling
we couldn't be dwindling
you couldn't be dwindling
they couldn't be dwindling	I couldn't have dwindled
you couldn't have dwindled
he couldn't have dwindled
we couldn't have dwindled
you couldn't have dwindled
they couldn't have dwindled	I couldn't have been dwindling
you couldn't have been dwindling
he couldn't have been dwindling
we couldn't have been dwindling
you couldn't have been dwindling
they couldn't have been dwindling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dwindle?
could you dwindle?
could he dwindle?
could we dwindle?
could you dwindle?
could they dwindle? 	could I be dwindling?
could you be dwindling?
could he be dwindling?
could we be dwindling?
could you be dwindling?
could they be dwindling? 	could I have dwindled?
could you have dwindled?
could he have dwindled?
could we have dwindled?
could you have dwindled?
could they have dwindled? 	could I have been dwindling?
could you have been dwindling?
could he have been dwindling?
could we have been dwindling?
could you have been dwindling?
could they have been dwindling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I dwindle?
couldn't you dwindle?
couldn't he dwindle?
couldn't we dwindle?
couldn't you dwindle?
couldn't they dwindle? 	couldn't I be dwindling?
couldn't you be dwindling?
couldn't he be dwindling?
couldn't we be dwindling?
couldn't you be dwindling?
couldn't they be dwindling? 	couldn't I have dwindled?
couldn't you have dwindled?
couldn't he have dwindled?
couldn't we have dwindled?
couldn't you have dwindled?
couldn't they have dwindled? 	couldn't I have been dwindling?
couldn't you have been dwindling?
couldn't he have been dwindling?
couldn't we have been dwindling?
couldn't you have been dwindling?
couldn't they have been dwindling?