Conjugación del verbo inglés
COULD UNDULATE

Verbo regular: undulate - undulated - undulated

Afirmación

Forma simple	Forma con V-ing
I could undulate you could undulate he could undulate we could undulate you could undulate they could undulate	I could be undulating you could be undulating he could be undulating we could be undulating you could be undulating they could be undulating
Perfecto	Perfecto con V-ing
I could have undulated you could have undulated he could have undulated we could have undulated you could have undulated they could have undulated	I could have been undulating you could have been undulating he could have been undulating we could have been undulating you could have been undulating they could have been undulating

Negación

Forma simple	Forma con V-ing
I could not undulate you could not undulate he could not undulate we could not undulate you could not undulate they could not undulate	I could not be undulating you could not be undulating he could not be undulating we could not be undulating you could not be undulating they could not be undulating
Perfecto	Perfecto con V-ing
I could not have undulated you could not have undulated he could not have undulated we could not have undulated you could not have undulated they could not have undulated	I could not have been undulating you could not have been undulating he could not have been undulating we could not have been undulating you could not have been undulating they could not have been undulating

Forma interrogativa

Forma simple	Forma con V-ing
could I undulate? could you undulate? could he undulate? could we undulate? could you undulate? could they undulate?	could I be undulating? could you be undulating? could he be undulating? could we be undulating? could you be undulating? could they be undulating?
Perfecto	Perfecto con V-ing
could I have undulated? could you have undulated? could he have undulated? could we have undulated? could you have undulated? could they have undulated?	could I have been undulating? could you have been undulating? could he have been undulating? could we have been undulating? could you have been undulating? could they have been undulating?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not undulate? could you not undulate? could he not undulate? could we not undulate? could you not undulate? could they not undulate?	could I not be undulating? could you not be undulating? could he not be undulating? could we not be undulating? could you not be undulating? could they not be undulating?
Perfecto	Perfecto con V-ing
could I not have undulated? could you not have undulated? could he not have undulated? could we not have undulated? could you not have undulated? could they not have undulated?	could I not have been undulating? could you not have been undulating? could he not have been undulating? could we not have been undulating? could you not have been undulating? could they not have been undulating?