Question

katie (not go) to the party last night because while she (go) going down the stairs, she (fall) and (injure) herself

Answer 1

Respuesta:

sorry per entiendo poco

Explicación:

Answer 2

Respuesta:

Katie didn´t go to the party last night because while she was going down the stairs, she fell and injured herself

En she (go) going no podria ir go, lo que para mi tiene sentido es que se ponga was para completar la el enunciado.

Espero haberte ayudado!