Yes. Is is the present-tense form of to be.
One important difference from English is that Afrikaans does not switch between am, is, and are in the present tense. It stays is:
So even with a plural subject, Afrikaans still uses is.
Because kort is the adjective that describes the subject through the linking verb is.
The structure is:
This works very much like English The sentence is short.
If you want the adjective directly before the noun instead, you can say:
After is, adjectives normally stay in their basic form in Afrikaans. So:
Not:
So in this sentence, kort does not need any extra ending.
Yes, in this simple sentence it is very similar to English:
So the pattern is subject + verb + adjective.
That said, Afrikaans has its own word-order rules in other sentence types. For example, if another element comes first, the verb still stays in second position:
You say:
Afrikaans usually uses a double nie for ordinary negation. In a simple sentence like this:
That double negative pattern is a very important feature of Afrikaans.
Here are the useful forms:
Notice:
A small writing tip: at the start of a sentence, 'n stays lowercase, so you write 'n Sin is kort, not 'N Sin is kort.