En la formación de preguntas en inglés que utilizan palabras interrogativas, es esencial colocar el verbo después del adverbio introductorio, conjugado según el tiempo correspondiente a la situación abordada.
Where did she buy her dress?
She bought it from target
Why did you run?
I ran because I was late
When did your English class start?
My english class started last week
WHEN:something happened
The wh questions have a nucleus, which is a verb placed after the introductory adverb and will be conjugated in the corresponding time according to the situation that you want to refer to.