Questions about the object

Questions about the object
Se llaman así porque se utilizan para identificar el objeto de una acción. Ejemplo:

John sent the letter.

Si nos interesa preguntar que mandó John, la pregunta tendrá la siguiente estructura:

What did John send?
Importante:
· En las preguntas objeto la presencia del auxiliar es obligatoria (excepto cuando se trata del verbo TO BE). El orden de las palabras es el orden estándar: pronombre interrogativo + auxiliar + sujeto + predicado
· El pronombre interrogativo es el objeto de la oración interrogativa.

La preguntas objeto también se construyen con los pronombres interrogativos who, which, what, lo que puede generar confusiones con las preguntas sujeto. Ejemplo:

Who do you believe: her or me?
Which pen do you want: the red one or the blue one?
What did you eat for breakfast yesterday?
También podemos utilizar estructuras con How much / many + sustantivo:
How many hours did you teach last year?
How much money do you normally spend on clothes?

Questions about the subject of a sentence

1. Questions about the Subject of a Sentence. (verb to be)
George Washington was the first president of the U.S.

Example:
Question: Who was the first president of the U.S.?
Short Answer: George Washington was.

Note: When you ask the question, you don't know the answer. Use the singular was in the question even if the answer is in the plural.

Example:
Mary and Adolf were absent from class two weeks ago.
Question: Who was absent from class two weeks ago?
Short Answer: Mary and Adolf were.

2. Questions about the Subject of a Sentence. (other verbs)
Anita spoke to me in French .

Example:

Question: Who spoke to you in French ?
Short Answer: Anita did.

3. A thing can also be subject of a sentence.
The earthquake caused the destruction.

Example: What caused the destruction?
Short Answer: The earthquake did.