Questions & Answers about Sie ist auch hier.
The word sie can mean "she", "they", or formal "you". How do we know it means "she" here?
We look at the verb! The verb ist is the form of sein (to be) used for he, she, or it. If sie meant "they" or formal "you", the verb would be sind (Sie sind auch hier).
Is Sie capitalized here because it's a special pronoun?
No, it is capitalized simply because it is the first word of the sentence. The German word for "she" is normally lowercase (sie). Only the formal "you" (Sie) is always capitalized no matter where it is in the sentence.
Could I put auch at the end of the sentence, like "too" in English?
In English we often say "She is here too," but in German, adverbs like auch (also/too) usually come right after the verb and before the location. So Sie ist auch hier is the standard word order, rather than putting auch at the end.
How is the ie in Sie and hier pronounced?
In German, the vowel combination ie makes a long "ee" sound, just like in the English word "see". So Sie sounds like "zee" and hier sounds very similar to the English word "here".