Zwei Bier, bitte – how to build the German plural

If you visit Germany and you would like to order more than one beer ...
🍻 ... hence knowing how to build the plural forms of German nouns comes in handy.
Here we present you with the rules for building a regular plural.
Please note that later on you have to deal with some exceptions as some nouns don’t take a plural form.

1. Building the plural by adding an -e to the end of the noun
   
   • masculine, monosyllabic nouns
     Example:
     Tisch → Tische
     table → tables
   • masculine nouns ending in -ling:
     Example:
     Feigling → Feiglinge
     coward → cowards
   • feminine , monosyllabic nouns:
     Example:
     Sucht → Süchte
     (Please note that German plural forms often change a vowel into an umlaut. Here the ‘u’ changes into ‘ü’.)
2. Building the plural with a plural ending in -n and -en:
   
   • feminine nouns that end in a vowel sound:
     Example:
     Idee → Ideen
     idea → ideas
   • feminine nouns with a consonant at the end:
     Example:
     Tür → Türen
     door → doors
   • masculine nouns for living beings:
     Example:
     Löwe → Löwen
     lion → lions
3. Building the plural form with -er at the end:
   neuter, monosyllabic nouns
   (Please note: The vowel in those nouns switches to a so called umlaut (ä, ö, ü).)
   Example:
   Haus → Häuser
   house → houses
4. Adding a -s at the end to form the plural
   This rule applies to nouns ending in -a, -i, -o or -u:
   Example:
   Mama → Mamas
   mommy → mommies
   Auto → Autos
   car → cars