Learn Hardcore German: Am Dienstag kaufe ich frisches Gemüse im Supermarkt. - On Tuesday I buy fresh vegetables at the supermarket.

In German, to express “on Tuesday,” you normally combine the preposition an with the definite article dem, giving an dem. This contracts to am. So:

am Dienstag = “on Tuesday.”
You wouldn’t say just Dienstag for a specific day unless it’s part of a larger phrase (e.g. “nächsten Dienstag”).

Why is the verb kaufe in second position, coming before the subject ich?

German is a V2 (verb-second) language: the conjugated verb must occupy the second “slot” in a main clause. If you start with a time expression like am Dienstag, that counts as the first slot. The verb then comes immediately after, causing a subject–verb inversion:

Slot 1: Am Dienstag
Slot 2: kaufe
Slot 3: ich
Rest of the sentence follows.

Could I also say Ich kaufe am Dienstag frisches Gemüse im Supermarkt?

Yes. If you begin with the subject ich, the verb still stays in second place:

Slot 1: Ich
Slot 2: kaufe
Slot 3: am Dienstag
…so both word orders are correct—the difference is only emphasis (time first vs. subject first).

Why is there no article before frisches Gemüse? Shouldn’t there be an indefinite article like ein?

You can omit the article when speaking about things in a general or non-count sense. Here, frisches Gemüse means “fresh vegetables” in general, not “a fresh vegetable” or “one set of fresh vegetables.” Leaving out the article is common when listing what you buy or eat.

Why does frisches end with -es?

This is a strong adjective ending. Rules at work:

Gemüse is neuter (das Gemüse).
In our sentence, Gemüse is the direct object, so it’s accusative.
There is no article before Gemüse, so the adjective must carry the case and gender information itself.
For neuter accusative, strong declension uses -es, hence frisches Gemüse.

What does im stand for in im Supermarkt?

im is a contraction of in dem. It’s the combination of the preposition in (meaning “in” or “at”) plus the dative article dem (because der Supermarkt is masculine). So:

in dem Supermarkt → im Supermarkt = “at/in the supermarket.”

Why are Dienstag, Gemüse, and Supermarkt capitalized?

In German, all nouns—common and proper—are capitalized. That includes days of the week (e.g. Dienstag) and general nouns like Gemüse and Supermarkt. This rule applies no matter where the noun appears in the sentence.

Why is Gemüse singular even though it refers to “vegetables” (plural)?

Gemüse is a mass (uncountable) noun in German. Even when you mean “various kinds of vegetables” or “a bunch of vegetables,” you still use the singular Gemüse. There is no common everyday plural form Gemüses in German.