Spanish language Q&A Forum

Hi!! I would like to ask a question. So I'm doing a presentation in Spanish and i want to use the present perfect subjunctive in the last sentence. I want to say "I hope you enjoyed my presentation". The dictionary says that it's "espero que les haya gustado mi precentación", but isn't "haya" the verb form for "usted" and not "ustedes"? Several people are going to listen to me, so I want to address them all. What do I say? Is it "espero que les hayán gustado mi precentación" or "espero que les hayáis gustado mi precentación", or is it the sentence I wrote earlier?

Thank you in advance!!

Just want to mention that there are a few spacing errors that make identifiers show up in the wrong place.  Ex:  Ella no quiere que nosotros comamos tan rápido. (present subjunctive)

She doesn't want us to eat so fast.

¿Por qué se usa  más que en vez de más de?  15 minutos es un número...

Could you highlight this difference in the lesson in yellow or some sort of emphasis? 

If we want to express the same but in the negative, the structure changes to:

               llevar (conjugated) + sin + infinitive

 And also, if correct, please add the explanation that  the action  changes from  past participle to infinitive because sin is a preposition, and that prepositions are followed by infinitives, not past particples.

I found the sentence, ¿por qué habría de asustar un sombrero?— me respondieron. I tried looking it up and apparently haber de can be used conditionally to express confusion of a topic. i think this is important as well as haber que, i saw it in a book although i can't remember the sentence haber que is apparently also another form of obligation like tener que

Can "esto" be used as a demonstrative pronoun?  For example, esto libro?

I found this confusing.

"Hemos pedido" translates into English as "asked," which is a past tense. So I wanted to use pusiera. But the answer requires present subjunctive (ponga).

Is it always true that when the main verb is in the present perfect, the subsequent clause will use the present subjunctive? So in Spanish we should treat present perfect as a present tense, whereas in English it is a past tense?

Are there 2 adverbs cuándo and cuando? WordReference.com has both listed. I need an explanation on this for A1 beginner (me).

In the lesson, these sentences do not make sense to me in English:

under the dictation, a part of the sentence says

Y nos invitaban a todos a una ceremonia y una fiesta, en una estación de esquí la Navidad próxima. 

i understand that nos invitaban = they invited us

nos invitaban a una fiesta = they invited us to a party

but what does a todos means?

ayudame por favor

muchas gracias