Posted by Yohann
For some neuter nouns the plural endings…
end in -e : das Jahr (s) = die Jahre (p). Meaning = year/years
end in -er : das Kind (s) = die Kinder (p). Meaning = child/children
end in an umlaut + er : das Glas (s) = die Gläser (p). Meaning = glass/glasses
end in -en : das Auge (s) = die Augen (p). Meaning = eye/eyes
have no change in the plural : das Mädchen (s) = die Mädchen (p). Meaning= girl
Some English adopted words will end in -s in the plural : die Party (s) = die Partys. Meaning = party/parties
Some nouns that end in -us or -um may end in -en : das Museum (s) = die Museen (p). Meaning = museum/museums
Nouns ending in -ma may end in -men in the plural : das Thema (s) = die Themen (p). Meaning = topic/topics or subject/subjects
There are certain nouns that are only used in the plural : Leute (people)
Posted by Yohann
The plural endings for masculine nouns can take on various endings in the plural form. (s) = singular. (p) = plural. (d) = definition.
Some nouns end in -e : der Arm (s) = die Arme (p). (d) = arm/arms
Some end in -en : der Junge (s) = die Jungen (p). (d) = boy/boys
Some end in an umlaut + e in the plural form : der Ball (s) = die Bälle (p). (d) = ball/balls
Umlaut + -er ending : der Mann (s) = die Männer (p). (d) = man/men
Some end in only an umlaut : der Vater (s) = die Väter (p). (d) = father/fathers
Some have no change in the ending : der Spiegel (s) = die Spiegel (p). (d) = mirror/mirrors
And now the plural ending for feminine nouns:
Can end in -en : die Zeitung (s) = die Zeitungen (p). (d) = newspaper/newspapers
Can end in -nen in the plural (especially for nouns ending in -in) : die Amerikanerin (s) = die Amerikanerinnen (p). (d) = American (woman)/Americans (women)
Can end in umlaut + -e : die Nacht (s) = die Nächte (p). (d) = night/nights
Can end in just an umalut in the plural : die Mutter (s) = die Mütter. (d) = mother/mothers