A) and C) do not exist.
B) What happens <-- This is an unfinished sentence. For example:
"What happens when it begins to rain and you don't have an umbrella?"
D) What happened? <--- Simple.. it asks what happened. You use this for things that happened in the past.
5 de julio de 2015
2
1
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!