Wij gebruiken de klimtechniek tijdens het topropen.

Both wij and we mean we.

• we is more common in everyday spoken Dutch.
• wij is a bit more formal or more emphatic.

So Wij gebruiken de klimtechniek tijdens het topropen is completely correct, but in casual speech many speakers would say We gebruiken de klimtechniek tijdens het topropen.

Gebruiken is the present tense form of the verb gebruiken (to use).

In Dutch, the present tense forms are:

• ik gebruik
• jij gebruikt
• hij/zij/het gebruikt
• wij gebruiken
• jullie gebruiken
• zij gebruiken

So here, because the subject is wij, the verb is gebruiken.

Because klimtechniek is a de-word in Dutch, so the correct article is de.

Unfortunately, whether a noun takes de or het often has to be learned word by word. There are patterns, but many nouns simply have to be memorized with their article.

So you should learn it as:

• de klimtechniek = the climbing technique

Yes. Dutch very often combines nouns into a single compound word.

Here:

• klim = climbing / climb
• techniek = technique

Together they form klimtechniek, meaning climbing technique.

This is very normal in Dutch. English often writes similar ideas as two words, while Dutch usually joins them into one.

Tijdens is a preposition meaning during.

It introduces the time situation in which something happens:

• tijdens het topropen = during top-roping

So the structure is:

• Wij gebruiken de klimtechniek = main statement
• tijdens het topropen = when / during what activity

Here topropen is being used as a noun referring to the activity itself, similar to top-roping in English.

Dutch often uses het with an activity used as a noun, especially with verb-like forms:

• het zwemmen
• het klimmen
• het lezen

In the same way, het topropen means top-roping as an activity.

So in this sentence, topropen is not acting like a finite verb; it is acting like a noun.

Because this is a normal main clause in Dutch, and Dutch main clauses usually follow the verb-second rule.

The order here is:

• Wij = subject
• gebruiken = finite verb
• de klimtechniek = direct object
• tijdens het topropen = prepositional phrase

This is a very standard Dutch sentence pattern.

If you move the time phrase to the beginning, the verb still has to stay in second position:

• Tijdens het topropen gebruiken wij de klimtechniek.

That is also correct.

Yes, absolutely.

Both are correct:

• Wij gebruiken de klimtechniek tijdens het topropen.
• Tijdens het topropen gebruiken wij de klimtechniek.

The difference is mostly emphasis.

• Starting with Wij puts the focus more on we or on the statement itself.
• Starting with Tijdens het topropen puts more focus on the time/activity context.

Notice that when the sentence starts with Tijdens het topropen, the verb gebruiken still comes second, so wij moves after the verb.

Because aan het + infinitive is used for an ongoing action, similar to be ...-ing in English.

For example:

• Wij zijn aan het topropen. = We are top-roping.

But in your sentence, the phrase after tijdens is not forming a progressive tense. It is simply a noun phrase after a preposition:

• tijdens het topropen = during top-roping

So het topropen here is the activity as a noun, not part of a progressive verb form.

Sometimes, yes, but the nuance is slightly different.

• tijdens het topropen = during top-roping
• bij het topropen = when top-roping / in top-roping

In many contexts they can be quite close, but tijdens is the more direct and literal way to say during.

So if the intended meaning is specifically during the activity, tijdens is a very natural choice.

It can often sound like a specific or context-known technique, because de is the definite article.

So de klimtechniek suggests:

• a particular climbing technique already known in the situation, or
• the relevant climbing technique in that context

If you wanted to emphasize one technique among many, you might say:

• een klimtechniek = a climbing technique

So the article changes the nuance:

• de klimtechniek = the climbing technique
• een klimtechniek = a climbing technique

Yes, in climbing contexts it is normal to find borrowed or adapted English terms in Dutch.

Dutch sports vocabulary often includes English-based words, especially for technical activities. In practice, climbers may use forms like topropen naturally in speech and writing.

So even though it comes from English top rope, it can function as a Dutch word here, with Dutch grammar:

• het topropen
• tijdens het topropen

That is very typical of modern Dutch vocabulary in specialized fields.