Questions & Answers about Die kwaliteit is goed.
Is is the present-tense form of to be in Afrikaans, just like English is in The quality is good.
In this sentence, it links the subject die kwaliteit to the description goed.
One very helpful feature of Afrikaans is that verbs usually do not change much for different persons in the present tense. For example:
- Ek is = I am
- Jy is = you are
- Hy is = he is
- Ons is = we are
So is is used very widely.