Wir baden im See.

Because baden is conjugated for wir (we) as baden.

In the present tense, baden goes like this:

• ich bade
• du badest
• er/sie/es badet
• wir baden
• ihr badet
• sie/Sie baden

So with wir, the verb form is baden.

Baden means to bathe, to go bathing, or often more naturally in this kind of sentence, to swim / go for a swim in the sense of being in the water for leisure.

A useful distinction is:

• baden = being in the water, bathing, enjoying the water
• schwimmen = swimming as the action of swimming

So:

• Wir baden im See. = We’re bathing / swimming in the lake.
• Wir schwimmen im See. = We’re swimming in the lake.

In real usage, baden can sound a bit broader and more relaxed than schwimmen.

Im is a contraction of in dem.

• in dem → im

This contraction is extremely common and usually preferred when it sounds natural.

So:

• Wir baden im See. literally contains
• Wir baden in dem See.

Both are grammatically possible, but im See is the normal everyday form.

Because this sentence describes location, not direction of movement.

German uses:

• dative after in when something is in a place
• accusative after in when something is moving into a place

Here, we are bathing in the lake: that is a location, so German uses the dative:

• im See = in the lake

Compare:

• Wir baden im See. = We are bathing in the lake.
• Wir gehen in den See. = We are going into the lake.

So im See is correct because the sentence answers where?, not where to?

Because See is a noun, and in German all nouns are capitalized.

So:

• wir = not capitalized
• baden = not capitalized
• See = capitalized because it is a noun

This is one of the most noticeable differences from English.

In this sentence, der See means lake.

This is a very common point of confusion because German has two similar words:

• der See = lake
• die See = sea (especially a poetic or maritime word for the sea)

So:

• im See here means in the lake

If a learner sees See, the article matters a lot.

Yes. In a normal German main clause, the finite verb usually comes in second position.

Here the structure is:

• Wir = subject
• baden = finite verb
• im See = prepositional phrase

So the standard order is:

• Wir baden im See.

German can move elements around for emphasis, but the verb still stays in second position in a main clause. For example:

• Im See baden wir.

That is possible, but it is more marked and emphasizes im See.

Because German often expresses the present idea with just the simple present tense.

• Wir baden.

This can mean:

• We bathe
• We are bathing

German does not need a separate am/is/are + -ing form the way English often does.

So Wir baden im See can naturally correspond to English We are bathing/swimming in the lake.

Usually, no. Baden is commonly used without a reflexive pronoun when talking about bathing or being in the water.

So:

• Wir baden im See. = normal and natural

You may also hear reflexive forms in some contexts, but for a simple sentence like this, wir baden is the standard choice.

A simple pronunciation guide is:

• Wir ≈ veer
• baden ≈ BAH-den
• im ≈ im
• See ≈ zay

So roughly:

• veer BAH-den im zay

A couple of useful notes:

• w in German sounds like English v
• s in See sounds like z
• ee in See is a long vowel, like ay in say, but pure and steady

Yes, absolutely.

Both are correct, but they are not exactly identical:

• Wir baden im See. = We are bathing / in the water / having a swim
• Wir schwimmen im See. = We are swimming

If you want to emphasize the physical action of swimming, use schwimmen. If you want a broader idea of being in the lake water for enjoyment, baden works very well.