Dün dağda kayak yaptık.

Because -da / -de is the locative ending, which means in / on / at.

• dağ = mountain
• dağda = on the mountain / in the mountain area

So dağda tells you the location of the action.

The ending appears as -da, -de, -ta, or -te depending on vowel harmony and consonant voicing. Here it is -da.

There are two things going on:

1. Vowel harmony
   The last vowel in dağ is a, so the ending uses a rather than e.

2. Consonant voicing
   Since dağ ends in a voiced sound, the ending uses d rather than t.

So:

• dağ + da → dağda

In Turkish, many activities are expressed with a noun + yapmak structure.

• kayak = ski / skiing
• yapmak = to do / to make

So kayak yapmak literally means to do skiing, but in natural English it means to ski.

This is very common in Turkish. Similar patterns include:

• spor yapmak = to do sports / exercise
• alışveriş yapmak = to shop
• dans yapmak is less common, but the pattern is familiar

So kayak yaptık means we skied.

Yaptık comes from yapmak (to do / make).

Breakdown:

• yap- = verb stem
• -tı / -ti / -tu / -tü = definite past tense
• -k = we

So:

• yap-tı-k = we did

In this sentence, because it is part of kayak yapmak, it means we skied.

The t instead of d happens because the verb stem ends in p, a voiceless consonant. This is a normal sound change in Turkish past-tense endings.

Because Turkish often leaves out subject pronouns when they are already clear from the verb ending.

Here, -k in yaptık already tells you the subject is we.

So:

• Biz dün dağda kayak yaptık. = We skied on the mountain yesterday.
• Dün dağda kayak yaptık. = same meaning, with we understood

Using biz is possible, but usually only if you want extra emphasis.

Turkish word order is flexible, and the beginning of the sentence often shows what the speaker wants to frame first.

Starting with Dün puts the time first:

• Dün dağda kayak yaptık. = Yesterday, we skied on the mountain.

This is very natural in Turkish.

You could also say:

• Dağda dün kayak yaptık.
• Kayak yaptık dün dağda.

But these sound different in emphasis. The original sentence is a very normal, neutral way to say it.

Yes. It uses the definite/simple past tense in Turkish.

The ending here is part of yaptık. This past tense is used for actions the speaker knows happened as a fact, often because they experienced them directly.

So yaptık means we did / we did do / we did it, and in this sentence, we skied.

This is the most straightforward past tense for a sentence like this.

The letter ğ in Turkish is usually not pronounced like a hard English g.

In dağda, it mainly lengthens the vowel before it rather than making a strong consonant sound.

So dağda sounds roughly like:

• daa-da

not like:

• dag-da

This is a very common source of confusion for English speakers.

Turkish does not use articles the same way English does.

So:

• dağ can mean mountain, a mountain, or the mountain
• kayak can mean skiing or ski

The exact meaning comes from context, not from articles.

That is why dağda can be translated as on the mountain or sometimes in the mountains, depending on context.

Usually, no, not if you mean we went skiing.

• kaymak means to slide
• kayak yapmak means to ski

So kaydık would normally mean we slid, not we skied.

To talk about the sport of skiing, kayak yapmak is the normal expression.

Because in kayak yapmak, kayak functions as part of a fixed expression with yapmak.

It is not a direct object here in the same way as a separate noun would be in English. Turkish often uses bare nouns in these activity expressions:

• kahvaltı yapmak = to have breakfast
• spor yapmak = to do sports
• kayak yapmak = to ski

So kayak stays in its basic form.

Yes, absolutely.

That sentence is correct:

• Biz dün dağda kayak yaptık.

But in Turkish, subject pronouns are often omitted unless you want contrast, emphasis, or clarity.

So:

• Dün dağda kayak yaptık. = neutral, natural
• Biz dün dağda kayak yaptık. = emphasizes we

For example, it could imply we did, maybe not someone else.

A helpful breakdown is:

• Dün = yesterday
• dağ-da = on the mountain
• kayak = skiing / ski
• yap-tı-k = we did

So the structure is basically:

Yesterday + on the mountain + skiing + we did

That is why the natural English translation becomes:

We skied on the mountain yesterday.