Conjugación del verbo inglés
COULD ULULATE

Verbo regular: ululate - ululated - ululated

Afirmación

Forma simple	Forma con V-ing
I could ululate you could ululate she could ululate we could ululate you could ululate they could ululate	I could be ululating you could be ululating she could be ululating we could be ululating you could be ululating they could be ululating
Perfecto	Perfecto con V-ing
I could have ululated you could have ululated she could have ululated we could have ululated you could have ululated they could have ululated	I could have been ululating you could have been ululating she could have been ululating we could have been ululating you could have been ululating they could have been ululating

Negación

Forma simple	Forma con V-ing
I could not ululate you could not ululate she could not ululate we could not ululate you could not ululate they could not ululate	I could not be ululating you could not be ululating she could not be ululating we could not be ululating you could not be ululating they could not be ululating
Perfecto	Perfecto con V-ing
I could not have ululated you could not have ululated she could not have ululated we could not have ululated you could not have ululated they could not have ululated	I could not have been ululating you could not have been ululating she could not have been ululating we could not have been ululating you could not have been ululating they could not have been ululating

Forma interrogativa

Forma simple	Forma con V-ing
could I ululate? could you ululate? could she ululate? could we ululate? could you ululate? could they ululate?	could I be ululating? could you be ululating? could she be ululating? could we be ululating? could you be ululating? could they be ululating?
Perfecto	Perfecto con V-ing
could I have ululated? could you have ululated? could she have ululated? could we have ululated? could you have ululated? could they have ululated?	could I have been ululating? could you have been ululating? could she have been ululating? could we have been ululating? could you have been ululating? could they have been ululating?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not ululate? could you not ululate? could she not ululate? could we not ululate? could you not ululate? could they not ululate?	could I not be ululating? could you not be ululating? could she not be ululating? could we not be ululating? could you not be ululating? could they not be ululating?
Perfecto	Perfecto con V-ing
could I not have ululated? could you not have ululated? could she not have ululated? could we not have ululated? could you not have ululated? could they not have ululated?	could I not have been ululating? could you not have been ululating? could she not have been ululating? could we not have been ululating? could you not have been ululating? could they not have been ululating?