Conjugación del verbo inglés
COULD DULL

Verbo regular: dull - dulled - dulled

Afirmación

Forma simple	Forma con V-ing
I could dull you could dull he could dull we could dull you could dull they could dull	I could be dulling you could be dulling he could be dulling we could be dulling you could be dulling they could be dulling
Perfecto	Perfecto con V-ing
I could have dulled you could have dulled he could have dulled we could have dulled you could have dulled they could have dulled	I could have been dulling you could have been dulling he could have been dulling we could have been dulling you could have been dulling they could have been dulling

Negación

Forma simple	Forma con V-ing
I couldn't dull you couldn't dull he couldn't dull we couldn't dull you couldn't dull they couldn't dull	I couldn't be dulling you couldn't be dulling he couldn't be dulling we couldn't be dulling you couldn't be dulling they couldn't be dulling
Perfecto	Perfecto con V-ing
I couldn't have dulled you couldn't have dulled he couldn't have dulled we couldn't have dulled you couldn't have dulled they couldn't have dulled	I couldn't have been dulling you couldn't have been dulling he couldn't have been dulling we couldn't have been dulling you couldn't have been dulling they couldn't have been dulling

Forma interrogativa

Forma simple	Forma con V-ing
could I dull? could you dull? could he dull? could we dull? could you dull? could they dull?	could I be dulling? could you be dulling? could he be dulling? could we be dulling? could you be dulling? could they be dulling?
Perfecto	Perfecto con V-ing
could I have dulled? could you have dulled? could he have dulled? could we have dulled? could you have dulled? could they have dulled?	could I have been dulling? could you have been dulling? could he have been dulling? could we have been dulling? could you have been dulling? could they have been dulling?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I dull? couldn't you dull? couldn't he dull? couldn't we dull? couldn't you dull? couldn't they dull?	couldn't I be dulling? couldn't you be dulling? couldn't he be dulling? couldn't we be dulling? couldn't you be dulling? couldn't they be dulling?
Perfecto	Perfecto con V-ing
couldn't I have dulled? couldn't you have dulled? couldn't he have dulled? couldn't we have dulled? couldn't you have dulled? couldn't they have dulled?	couldn't I have been dulling? couldn't you have been dulling? couldn't he have been dulling? couldn't we have been dulling? couldn't you have been dulling? couldn't they have been dulling?