Learn Hardcore Russian: Мы пошли на экскурсию в старинный замок. - We went on an excursion to an ancient castle.

Пошли is the past tense, plural form of the verb пойти (“to go”). It indicates that the action of going is completed and that the subject (мы – we) performed the action in the past. Unlike the present tense (идём – “are going”), пошли clearly marks the event as finished.

Why is the preposition на used with экскурсию, and which case does it require?

In Russian, when referring to going on an activity or event such as an excursion, the preposition на is used. This preposition signifies participation or purpose and requires the accusative case. Therefore, экскурсию is in the accusative form, fitting the pattern for activities like trips, meetings, or excursions.

Why do we use в with старинный замок instead of на?

The preposition в is used to indicate movement toward or into a physical location. Since a castle is a tangible place that one can enter, в старинный замок correctly points to the destination of the excursion. Using на would be inappropriate here because на is typically reserved for events or activities, not physical spaces like buildings.

How does the adjective старинный agree with the noun замок?

The adjective старинный means “old” or “ancient” and modifies замок (“castle”). In this sentence, замок is an inanimate masculine noun in the accusative case. For inanimate masculine nouns, the accusative form of the adjective is identical to its nominative form, so старинный remains unchanged and properly agrees with замок.

What is the overall structure of the sentence, and how do its components function?

The sentence Мы пошли на экскурсию в старинный замок is structured as follows:

Мы is the subject (“we”).
пошли is the past tense verb indicating that the action of going is completed.
на экскурсию is a prepositional phrase using на with the accusative to describe the type of activity (an excursion).
в старинный замок is another prepositional phrase using в with the accusative to specify the destination (an old/ancient castle). Together, these parts convey that “we went on an excursion to an ancient castle.”