Spanish language Q&A Forum

In the sentence ¿Deben invitar a Luis a cenar? I am wondering why the sentence does not read ¿Deben invitar a Luis cenar?

What is the grammar rule that requires the second 'a'?

Thanks!

Leo

this is a helpful lesson with good examples.

but I’m confused.  the lesson says:  The verb is conjugated in the 3rd person singular or plural, according to the subject in the sentence.

aren’t the singular or plural things the objects of the sentences?

Is there a difference between the above options?  It looks like they can be used interchangeably, but I'm not sure.  Here are the examples:

Van a construir un hotel cien por cien ecológico.

Estoy seguro al ciento por ciento.

Thanks!

I thought Ojalá had the accent on the last A.

How to distinguish when to use direct pronouns and when indirect?

In the tip it says - Unlike in English where as if is often followed by a past tense in the indicative, in Spanish como si can never be followed by a tense in the indicative or El Presente de Subjuntivo, or El Pretérito Perfecto Subjuntivo.  But there is a C1 lesson that is about using como si followed by the indicative.  Is this tip incorrect, or am I missing something?

Why the speaker can see him/herself in this time frame? It's obvious that the speaker is talking about someone else.

Thank u so much

Helpful maybe to think of salvo que, a no ser que, a menos que (and sin que) followed by subjunctive as implying a NOT. A conditional : Unless = If not.