W sobotę rano przekopujemy ziemię w ogrodzie.

Because Polish often drops subject pronouns when they are clear from the verb form.

The verb przekopujemy ends in -my, which tells you the subject is we.

So:

• przekopujemy = we dig / we are digging / we will be digging (depending on context)

You could add my for emphasis:

• My przekopujemy ziemię w ogrodzie. = We are the ones digging the soil in the garden.

But in a neutral sentence, leaving my out is completely normal.

Przekopujemy comes from the verb przekopywać.

It usually means more than just to dig in a general sense. In a gardening context, it means:

• to dig over
• to turn over the soil
• to dig through

So przekopujemy ziemię suggests working the soil with a spade or shovel, turning it over, preparing it, etc.

This is more specific than plain kopać, which is the more general verb to dig.

In Polish, the present tense of an imperfective verb is often used for a planned or scheduled future action, especially when the time is clearly given.

So:

• W sobotę rano przekopujemy ziemię w ogrodzie.

can mean something like:

• On Saturday morning we’re digging over the soil in the garden.
• On Saturday morning we dig over the soil in the garden.

The future meaning comes from W sobotę rano.

Also, because the verb is imperfective (przekopywać), the sentence focuses on the activity itself rather than its completion.

If you wanted to stress completion, you would more likely use the perfective future:

• W sobotę rano przekopiemy ziemię w ogrodzie.

Because ziemię is the accusative singular form of ziemia.

Here, ziemia is the direct object of the verb przekopujemy:

• What are we digging over? → the soil / the earth

Polish changes noun endings depending on grammatical case. For this feminine noun:

• nominative: ziemia
• accusative: ziemię

So:

• Ziemia jest mokra. = The soil is wet.
• Przekopujemy ziemię. = We are digging over the soil.

Because Polish commonly uses w + accusative for a specific day when something happens.

So:

• sobota = Saturday
• w sobotę = on Saturday

This is a standard time expression.

More examples:

• w poniedziałek = on Monday
• w środę = on Wednesday
• w niedzielę = on Sunday

So w sobotę rano means on Saturday morning.

Rano is an adverb meaning:

• in the morning
• morning
• sometimes early in the morning, depending on context

It does not need a preposition here.

So:

• rano = in the morning
• w sobotę rano = on Saturday morning

Compare:

• Pracuję rano. = I work in the morning.
• W sobotę rano odpoczywamy. = On Saturday morning we rest.

This is a very natural Polish structure.

Because w ogrodzie expresses location: in the garden.

After w meaning in, Polish uses the locative case when talking about where something happens.

The noun changes like this:

• nominative: ogród = garden
• locative: w ogrodzie = in the garden

So:

• Ogród jest duży. = The garden is big.
• Pracujemy w ogrodzie. = We are working in the garden.

Because the same preposition w is being used in two different ways:

• w sobotę = on Saturday → time expression
• w ogrodzie = in the garden → location

Even though the preposition is the same, the case after it is different:

• w sobotę → accusative
• w ogrodzie → locative

So this is completely normal in Polish.

No, Polish word order is fairly flexible.

The sentence:

• W sobotę rano przekopujemy ziemię w ogrodzie.

is a natural, neutral way to say it.

But other orders are possible, depending on what you want to emphasize:

• Rano w sobotę przekopujemy ziemię w ogrodzie.
• Ziemię przekopujemy w sobotę rano w ogrodzie.
• W ogrodzie przekopujemy ziemię w sobotę rano.

The basic meaning stays similar, but the focus changes slightly.

For learners, the original version is a good neutral model.

Usually, W sobotę rano sounds more like on Saturday morning as a specific occasion or a planned event.

If you want to say something habitual, Polish more naturally uses the plural:

• W soboty rano przekopujemy ziemię w ogrodzie.

That means:

• On Saturday mornings we dig over the soil in the garden.
• Every Saturday morning we dig over the soil in the garden.

So the singular w sobotę rano is more likely to refer to one Saturday, while w soboty rano suggests a repeated habit.