De teamleider controleert de bereikbaarheid.

Dutch forms compound nouns very freely, and they are normally written as a single word. So teamleider is made from team + leider and means team leader.

This is very common in Dutch:

• huis
  • deur → huisdeur
• school
  • gebouw → schoolgebouw

English often writes these as two words, but Dutch usually joins them.

Because the subject is de teamleider, which is third-person singular: he/she/it.

The infinitive is controleren. In the present tense:

• ik controleer
• jij controleert
• hij/zij controleert
• de teamleider controleert
• wij controleren

So controleert is the normal present-tense form for a singular subject other than ik.

No, this is the normal word order for a simple main clause in Dutch:

subject + verb + object

• De teamleider = subject
• controleert = verb
• de bereikbaarheid = object

This is similar to English in a basic statement.

Because both teamleider and bereikbaarheid are de-woorden.

A useful rule here is that nouns ending in -heid are almost always de words. So:

• de mogelijkheid
• de veiligheid
• de bereikbaarheid

For teamleider, you mostly just learn it as a de noun: de teamleider.

It is an abstract noun. It is built from:

• bereiken = to reach
• -baar = able to be
• -heid = -ness / -ity

So bereikbaar means reachable / available / accessible, and bereikbaarheid means something like reachability, availability, or accessibility, depending on context.

This kind of word formation is very common in Dutch.

Usually not. Dutch controleren often means to check, to inspect, or to verify.

So in many contexts, controleert is closer to:

• checks
• verifies
• inspects

It does not usually mean to control in the sense of to manage or to be in charge of. That is an important false-friend warning for English speakers.

In Dutch, you usually make a yes/no question by putting the verb first:

Controleert de teamleider de bereikbaarheid?

So the structure becomes:

verb + subject + object

That is a very common pattern in Dutch questions.

A natural negated version is:

De teamleider controleert de bereikbaarheid niet.

Dutch usually places niet later in the sentence, often after the object if the object is definite, as it is here.

So:

• De teamleider controleert de bereikbaarheid.
• De teamleider controleert de bereikbaarheid niet.

The main stress is on rijk: be-REIK-baar-heid.

A few pronunciation notes:

• ei sounds roughly like the vowel in English day, but not exactly the same.
• g/ch in many Dutch accents is a throaty sound that English does not have.
• -heid sounds roughly like hite, but with a Dutch ei sound.

You do not need perfect pronunciation right away, but recognizing the stress pattern helps a lot.

Yes. De teamleider is grammatically the same for both.

Dutch job titles are often used without changing the form for gender, especially in modern usage. If needed, later context or pronouns can make the gender clear:

• De teamleider controleert de bereikbaarheid. Hij ...
• De teamleider controleert de bereikbaarheid. Zij ...

So the noun itself does not have to tell you whether the person is male or female.