use of perfect

hello,

i have a really big problem with the negativation of arabic sentenses in perfect, so, how do i negate the sentense "كنت قد كتنت كتابا في الشتاء" > like this: "كنت لم افعل؟" or
لم اكن افعل؟
and what about "اكون قد فعلت" is it "كنت لا افعل" or "لا اكون قد فعلت" ? and when do i use which form? that's a bit difficult for me, thanks for help :)

In Arabic language , there is no clear perfekt like in English and German

in order to use perfekt you should :

put the verb in past form + some words that indicate perfekt in Arabic

for example  : verb                      رأيت   - يرى

                 perfekt words              للتو - منذ برهة - قبل قليل

and now the sentence :         رأيت منذ برهة سيارة جميلة (Ich habe schönes Auto gesehen)