Prepositional is a word that expresses a relationship between a noun/pronoun and another word in a sentence. Easier way to put it would be like saying you take a object or noun (ex: home) and also make up a location (ex: in), basically noun relation to a verb.
Example: <u>In my house</u>, you'll find my dog. House relates to where the dog is.
Answer:
yes, no, yes
Explanation:
Te esta preguntando si esta leyendo en el primero entonces es si. En el segundo pregunta si estan viendo tele entonces es no. El tercero te pregunta si etan nadando es un si.
"Today nobody brought his or her instrument" is correct. It is common for people to use "their" in a sentence like this, but "his or her" is the more proper term.