This question already has an answer here:
I saw that sometimes “en” and “au” are used before a country. Can I always use “en”, or there are some situations that I have to use “au”.
Can you kindly clarify that point?
Demandé par: Simplicity
You can’t always use “en”. When you need to use “à” + country, you’ll need to use “au” if the country’s name is singular masculine and begins with a consonant sound, “en” when it is singular feminine or singular masculine and begin with a vowel sound, and “aux” when it is plural.
Le Danemark, l’Afghanistan, la Belgique, les États-Unis
Au Danemark, en Afghanistan, en Belgique, aux États-Unis.