Redundant Indirect Object Pronoun Is Le Redundant In Preguntémosle Al Estúpido A Él by Alex

What is the only situation where the redundant "le" isn't mandatory?
The only situation where the redundant "le" isn't mandatory is if a noun acting as the indirect object is placed after the verb.

What are the two situations when the redundant "le" is mandatory?
The two situations when the redundant "le" is mandatory are:

  1. When the noun that acts as the indirect object appears before the verb.
  2. When the indirect object indicates who experiences or feels the action, rather than who the action is addressed to.
Examples of both situations when the redundant "le" is mandatory

Al estúpido le hemos preguntado cinco veces.
Le molestó a ese estúpido que le preguntáramos tantas veces.

When is the redundant "le" included in speech?
The redundant "le" is included in speech almost always.

What two combinations of unstressed and stressed pronouns are allowed in a sentence?
The two combinations of unstressed and stressed pronouns which are allowed in a sentence include:

  • Unstressed pronouns by themselves.
  • Unstressed pronouns and stressed pronouns.
Examples of unstressed pronouns by themselves and then with stressed pronouns

Le he preguntado qué piensa.
Le he preguntado a él que piensa.

Can you use stressed pronouns by themselves in a sentence?
No, you can't use stressed pronouns by themselves in a sentence.

Example of trying to use stressed pronouns by themselves in a sentence incorrectly

He preguntado a él qué piensa.

What are some exceptions to the rule about stressed pronouns not being allowed by themselves?
The exceptions to the rule about stressed pronouns not being allowed by themselves include:

  • Verbs indicating direction.
  • The verb "parecer."
  • Sentences in which the verb is ditransitive and the direct object is in the first or second person.
Examples of exceptions to the rule about stressed pronouns not being allowed by themselves

Se le acercó a él.
Se le parece a ella.
Te le venderán a él.
Te Me recomendaron a ti.
Me le presentaron a él.

...