У середу ми йдемо до магазину.

Because after у / в when talking about on Wednesday, Ukrainian uses the accusative case.

• Dictionary form: середа = Wednesday
• In this sentence: у середу = on Wednesday

This is very common with days of the week in Ukrainian. For feminine nouns like середа, the ending often changes from -а to -у in the accusative singular.

Here у means on, as in on Wednesday.

So:

• у середу = on Wednesday

Ukrainian often uses у or в where English uses prepositions like in, at, or on. The exact English translation depends on the phrase, not just the single word.

У and в are usually just two pronunciation variants of the same preposition. Ukrainian switches between them to make the sentence sound smoother.

So both of these can be possible:

• У середу
• В середу

In this sentence, у середу sounds natural and avoids a less smooth sound sequence at the beginning.

Йдемо is the 1st person plural present tense form of йти.

• йти = to go, to walk
• йдемо = we go / we are going

So ми йдемо means we are going or we go.

A useful thing to know: йти usually describes movement in one direction, often a specific trip that is happening now or is planned.

Because йдемо suggests one specific trip in one direction, while ходимо usually suggests habitual/repeated going or going around in general.

Compare:

• Ми йдемо до магазину. = We are going to the store.
  → one trip, right now or as a specific plan

• Ми ходимо до магазину щосереди. = We go to the store every Wednesday.
  → repeated habit

This is a very important difference in Ukrainian verbs of motion.

Because the preposition до requires the genitive case.

• Dictionary form: магазин = store / shop
• After до: магазину

So:

• до магазину = to the store

This is a standard pattern:

• до дому = to home
• до школи = to school
• до магазину = to the store

Yes, very often you can.

Both of these can mean to the store:

• йти до магазину
• йти в магазин

A simple way to think about the difference:

• до магазину = to/toward the store
• в магазин = into the store

In everyday speech, both are common and often translate the same way in English. But grammatically they use different cases:

• до
  • genitive → до магазину
• в
  • accusative → в магазин

No. This is a false friend.

• магазин = store / shop
• журнал = magazine

So до магазину means to the store, not to the magazine.

Grammatically, йдемо is present tense.

However, just like in English, the present tense can be used for a planned future action, especially when a time expression is given:

• У середу ми йдемо до магазину.

Depending on context, this could mean:

• On Wednesday we are going to the store
• On Wednesday we’re going to the store

So the form is present, but the meaning can be future if the context makes that clear.

It could be omitted.

Ukrainian verb endings often already show who the subject is:

• йдемо already means we go / we are going

So both are possible:

• У середу ми йдемо до магазину.
• У середу йдемо до магазину.

Including ми can add clarity, emphasis, or contrast.

Yes, Ukrainian word order is fairly flexible.

This sentence starts with У середу to highlight the time:

• У середу ми йдемо до магазину. = On Wednesday, we are going to the store.

You could also say:

• Ми йдемо до магазину у середу.
• До магазину ми йдемо у середу.

These versions are all grammatical, but the emphasis changes. Ukrainian often moves words around to highlight what is most important or most new in the sentence.

Because Ukrainian does not have articles like a and the.

So магазин can mean:

• a store
• the store

The exact meaning depends on context. In this sentence, English naturally uses the store, but Ukrainian does not need a separate word for that.