Conjugación del verbo inglés
COULD TREMBLE

Verbo regular: tremble - trembled - trembled

Afirmación

Forma simple	Forma con V-ing
I could tremble you could tremble she could tremble we could tremble you could tremble they could tremble	I could be trembling you could be trembling she could be trembling we could be trembling you could be trembling they could be trembling
Perfecto	Perfecto con V-ing
I could have trembled you could have trembled she could have trembled we could have trembled you could have trembled they could have trembled	I could have been trembling you could have been trembling she could have been trembling we could have been trembling you could have been trembling they could have been trembling

Negación

Forma simple	Forma con V-ing
I couldn't tremble you couldn't tremble she couldn't tremble we couldn't tremble you couldn't tremble they couldn't tremble	I couldn't be trembling you couldn't be trembling she couldn't be trembling we couldn't be trembling you couldn't be trembling they couldn't be trembling
Perfecto	Perfecto con V-ing
I couldn't have trembled you couldn't have trembled she couldn't have trembled we couldn't have trembled you couldn't have trembled they couldn't have trembled	I couldn't have been trembling you couldn't have been trembling she couldn't have been trembling we couldn't have been trembling you couldn't have been trembling they couldn't have been trembling

Forma interrogativa

Forma simple	Forma con V-ing
could I tremble? could you tremble? could she tremble? could we tremble? could you tremble? could they tremble?	could I be trembling? could you be trembling? could she be trembling? could we be trembling? could you be trembling? could they be trembling?
Perfecto	Perfecto con V-ing
could I have trembled? could you have trembled? could she have trembled? could we have trembled? could you have trembled? could they have trembled?	could I have been trembling? could you have been trembling? could she have been trembling? could we have been trembling? could you have been trembling? could they have been trembling?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I tremble? couldn't you tremble? couldn't she tremble? couldn't we tremble? couldn't you tremble? couldn't they tremble?	couldn't I be trembling? couldn't you be trembling? couldn't she be trembling? couldn't we be trembling? couldn't you be trembling? couldn't they be trembling?
Perfecto	Perfecto con V-ing
couldn't I have trembled? couldn't you have trembled? couldn't she have trembled? couldn't we have trembled? couldn't you have trembled? couldn't they have trembled?	couldn't I have been trembling? couldn't you have been trembling? couldn't she have been trembling? couldn't we have been trembling? couldn't you have been trembling? couldn't they have been trembling?