I have had a frustratingly bothersome question for many months that I have not been able to find an answer to, nor has it been explained in the lessons, so I will ask here and hope that one of our resident experts can enlighten me.
I have noticed many sentences in the lessons include an "a" (to) immediately before an infinitive, and probably just as many that do not include the "a," even though the english word "to" is obviously implied. For example, this afternoon I was reviewing lesson 2.8 in the Premium Course and came across the following two sentences:
Espero terminar pronto....I hope TO finish soon.
No vamos a terminar pronto....we are not going TO finish soon.
I can see no grammatical difference between the structure of these sentences (other than one is a positive statement and the other negative), yet the "a" is omitted in the first and included in the second.
Please, someone, cause these scales to fall from my eyes!