The plural changes of nouns have the following laws, but they are not absolute, and most of them are applicable.

1. The singular and plural forms of masculine and neuter nouns ending in er, el and en are the same. Example: the plural of der Lehrer is die Lehrer.

2. The stems are A, O and U, which need to be changed. Example: Dewart complex number is Dewart.

3. add the suffix e, and several noun stems need to be changed. Example: The plural number of dice points is diewanender.

4. Add the suffix en or n (most words). Example: Art is art.

Add the suffix er, and the root vowel will change. Example: das Bild complex number is die Bilder.

6. add the suffix s. Example: the complex number of das Auto is die Autos.

Here are some things to pay attention to:

1. Some nouns only have singular forms, such as daseis der Teedie Politizei der Hange das Tempo der Bedarf.

2. Some nouns only have plural forms, such as Alpen Die Elten Die Kosten Die USA Die Leute Die Niederlande.

3. Some nouns have different plural forms and different meanings. For example, the plural form of bank is bank.

4. The plural suffix of nouns ending in nis is nisse. For example, the complex number of das Ergebnis is die Ergebnisse.

5. feminine nouns with suffix in and plural suffix innen. Example: diefrendinn complex number is diefrendinnen.

6. Composition of plural numbers of loanwords: most of them are E or en or N, but some of them add S, and the plural form ending in ismus is ismen；; The one ending in um is changed to en; Plural nouns ending in al and il plus ien or e

Example: Millionaire-Millionaire

Demmonstrant——Demmonstrant

geologic age

Das team-das team

Moral mechanism-moral mechanism

Gymnasium-gymnasium

Material-material

These are summarized by our German teacher, hoping to help you.