AYUDA plssshas un ejemplo de pasado simple con el verbo Could con cada uno de los pronombres personales​

i could go swimming

you could play tenis

he could do his homework

she could play the piano

it could make a lot of noise

we could cook the meal

they could sleep at night

la estructura es sencilla solo debes recordar que después de could jamás va to, no puedes poner i could to play o algo así..