I could measure you could measure she could measure we could measure you could measure they could measure
Forma con V-ing
I could be measuring you could be measuring she could be measuring we could be measuring you could be measuring they could be measuring
Perfecto
I could have measured you could have measured she could have measured we could have measured you could have measured they could have measured
Perfecto con V-ing
I could have been measuring you could have been measuring she could have been measuring we could have been measuring you could have been measuring they could have been measuring
Negación
Forma simple
I couldn't measure you couldn't measure she couldn't measure we couldn't measure you couldn't measure they couldn't measure
Forma con V-ing
I couldn't be measuring you couldn't be measuring she couldn't be measuring we couldn't be measuring you couldn't be measuring they couldn't be measuring
Perfecto
I couldn't have measured you couldn't have measured she couldn't have measured we couldn't have measured you couldn't have measured they couldn't have measured
Perfecto con V-ing
I couldn't have been measuring you couldn't have been measuring she couldn't have been measuring we couldn't have been measuring you couldn't have been measuring they couldn't have been measuring
Forma interrogativa
Forma simple
could I measure? could you measure? could she measure? could we measure? could you measure? could they measure?
Forma con V-ing
could I be measuring? could you be measuring? could she be measuring? could we be measuring? could you be measuring? could they be measuring?
Perfecto
could I have measured? could you have measured? could she have measured? could we have measured? could you have measured? could they have measured?
Perfecto con V-ing
could I have been measuring? could you have been measuring? could she have been measuring? could we have been measuring? could you have been measuring? could they have been measuring?
Forma interro-negativa
Forma simple
couldn't I measure? couldn't you measure? couldn't she measure? couldn't we measure? couldn't you measure? couldn't they measure?
Forma con V-ing
couldn't I be measuring? couldn't you be measuring? couldn't she be measuring? couldn't we be measuring? couldn't you be measuring? couldn't they be measuring?
Perfecto
couldn't I have measured? couldn't you have measured? couldn't she have measured? couldn't we have measured? couldn't you have measured? couldn't they have measured?
Perfecto con V-ing
couldn't I have been measuring? couldn't you have been measuring? couldn't she have been measuring? couldn't we have been measuring? couldn't you have been measuring? couldn't they have been measuring?