Conjugación del verbo inglés
COULD TUG

Verbo regular: tug - tugged - tugged

Afirmación

Forma simple	Forma con V-ing
I could tug you could tug she could tug we could tug you could tug they could tug	I could be tugging you could be tugging she could be tugging we could be tugging you could be tugging they could be tugging
Perfecto	Perfecto con V-ing
I could have tugged you could have tugged she could have tugged we could have tugged you could have tugged they could have tugged	I could have been tugging you could have been tugging she could have been tugging we could have been tugging you could have been tugging they could have been tugging

Negación

Forma simple	Forma con V-ing
I couldn't tug you couldn't tug she couldn't tug we couldn't tug you couldn't tug they couldn't tug	I couldn't be tugging you couldn't be tugging she couldn't be tugging we couldn't be tugging you couldn't be tugging they couldn't be tugging
Perfecto	Perfecto con V-ing
I couldn't have tugged you couldn't have tugged she couldn't have tugged we couldn't have tugged you couldn't have tugged they couldn't have tugged	I couldn't have been tugging you couldn't have been tugging she couldn't have been tugging we couldn't have been tugging you couldn't have been tugging they couldn't have been tugging

Forma interrogativa

Forma simple	Forma con V-ing
could I tug? could you tug? could she tug? could we tug? could you tug? could they tug?	could I be tugging? could you be tugging? could she be tugging? could we be tugging? could you be tugging? could they be tugging?
Perfecto	Perfecto con V-ing
could I have tugged? could you have tugged? could she have tugged? could we have tugged? could you have tugged? could they have tugged?	could I have been tugging? could you have been tugging? could she have been tugging? could we have been tugging? could you have been tugging? could they have been tugging?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I tug? couldn't you tug? couldn't she tug? couldn't we tug? couldn't you tug? couldn't they tug?	couldn't I be tugging? couldn't you be tugging? couldn't she be tugging? couldn't we be tugging? couldn't you be tugging? couldn't they be tugging?
Perfecto	Perfecto con V-ing
couldn't I have tugged? couldn't you have tugged? couldn't she have tugged? couldn't we have tugged? couldn't you have tugged? couldn't they have tugged?	couldn't I have been tugging? couldn't you have been tugging? couldn't she have been tugging? couldn't we have been tugging? couldn't you have been tugging? couldn't they have been tugging?