rot rote roter rotes

[Vermew]

I only know how to user 'rot' like adjective. The others depend on gender, but I still get confused how to use them. I have been searching in Google as well, still cannot answer my question. Can anyone please explain? Like, Die Jacke ist rot, Die rote Jacke? why? Thank you in advance!

[jzsuzsi]

German adjective endings are not so easy.

Look up here: https://www.lsa.umich.edu/german/hmr/Grammatik/Adjektive/Adjektivendungen.html

https://www.duolingo.com/comment/21195697

http://www.nthuleen.com/teach/grammar/adjektivendungenexpl.html

for Die Jacke ist rot: when the adjective is after the noun, you don't have to use all those crazy declensions, the adjective stays in the original form.

[RowenaJane]

Maybe someone else can give you a more technical answer but the adjective endings don't change after 'sein' (to be) but where you have 'der' 'die' 'das' 'ein' ' eine' etc.the adjective has to agree with the noun

[SuO-M]

This is because "sein" is what is called a copulative verb. In case-based languages such as German or Latin when you use a copulative the object or attribute is considered to be in the nominative case (same as the subject).

[Scott31461]

Hope this can help. https://www.cactus2000.de/deutsch/adject/showadj_en.php?adj=rot