Questions & Answers about Гид ведёт туристов по городу.
Word by word:
- Гид – noun, nominative singular, masculine in gender. It is the subject: the guide.
- ведёт – verb, 3rd person singular, present tense, imperfective, from вести (to lead, to guide). It is the main verb: leads / is leading.
- туристов – noun, accusative plural, masculine, animate. It is the direct object: tourists.
- по городу – prepositional phrase:
- по – preposition, here used with the dative case to express movement around/through a place.
- городу – noun город in dative singular: around/through the city.
So syntactically: Subject (Гид) + Verb (ведёт) + Object (туристов) + Adverbial (по городу).