Learn Dutch: Mijn tantes partner is een goede arts. - My aunt's partner is a good doctor.

In Dutch, you attach the possessive -s directly to the noun if it doesn't change the pronunciation of the final vowel. Words ending in an unaccented 'e' (like tante), as well as consonants (like vader), just get an -s added to the end. You only use an apostrophe if the noun ends in a single open vowel (a, i, o, u, y) to keep that vowel sounding long, like in oma's partner.

Why does the adjective have an 'e' at the end (goede) when used with een?

Adjectives usually get an -e added to them when they come right before a noun. The only time you leave the -e off after een is when the noun is a het word. Since arts is a de word (de arts), the adjective gets the -e ending: een goede arts.

Is there another way to say 'my aunt's partner' without using the possessive -s?

Yes! A very common way to show possession in Dutch is using van (of). You can say de partner van mijn tante (the partner of my aunt). Both ways are perfectly natural and used often.

What is the difference between arts and dokter?