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