I could tiptoe you could tiptoe he could tiptoe we could tiptoe you could tiptoe they could tiptoe
Forma con V-ing
I could be tiptoing you could be tiptoing he could be tiptoing we could be tiptoing you could be tiptoing they could be tiptoing
Perfecto
I could have tiptoed you could have tiptoed he could have tiptoed we could have tiptoed you could have tiptoed they could have tiptoed
Perfecto con V-ing
I could have been tiptoing you could have been tiptoing he could have been tiptoing we could have been tiptoing you could have been tiptoing they could have been tiptoing
Negación
Forma simple
I couldn't tiptoe you couldn't tiptoe he couldn't tiptoe we couldn't tiptoe you couldn't tiptoe they couldn't tiptoe
Forma con V-ing
I couldn't be tiptoing you couldn't be tiptoing he couldn't be tiptoing we couldn't be tiptoing you couldn't be tiptoing they couldn't be tiptoing
Perfecto
I couldn't have tiptoed you couldn't have tiptoed he couldn't have tiptoed we couldn't have tiptoed you couldn't have tiptoed they couldn't have tiptoed
Perfecto con V-ing
I couldn't have been tiptoing you couldn't have been tiptoing he couldn't have been tiptoing we couldn't have been tiptoing you couldn't have been tiptoing they couldn't have been tiptoing
Forma interrogativa
Forma simple
could I tiptoe? could you tiptoe? could he tiptoe? could we tiptoe? could you tiptoe? could they tiptoe?
Forma con V-ing
could I be tiptoing? could you be tiptoing? could he be tiptoing? could we be tiptoing? could you be tiptoing? could they be tiptoing?
Perfecto
could I have tiptoed? could you have tiptoed? could he have tiptoed? could we have tiptoed? could you have tiptoed? could they have tiptoed?
Perfecto con V-ing
could I have been tiptoing? could you have been tiptoing? could he have been tiptoing? could we have been tiptoing? could you have been tiptoing? could they have been tiptoing?
Forma interro-negativa
Forma simple
couldn't I tiptoe? couldn't you tiptoe? couldn't he tiptoe? couldn't we tiptoe? couldn't you tiptoe? couldn't they tiptoe?
Forma con V-ing
couldn't I be tiptoing? couldn't you be tiptoing? couldn't he be tiptoing? couldn't we be tiptoing? couldn't you be tiptoing? couldn't they be tiptoing?
Perfecto
couldn't I have tiptoed? couldn't you have tiptoed? couldn't he have tiptoed? couldn't we have tiptoed? couldn't you have tiptoed? couldn't they have tiptoed?
Perfecto con V-ing
couldn't I have been tiptoing? couldn't you have been tiptoing? couldn't he have been tiptoing? couldn't we have been tiptoing? couldn't you have been tiptoing? couldn't they have been tiptoing?