She kok salah
I have known her since she was a child
I have known her since she was young
Kenapa saya pakai kid salah?
Kid = informal. Child = formal. Sebenernya bisa aja pakai "kid" tapi duolingo bahasanya formal
Kenapa engga pake have been?
Bukankah jika menggunakan was harus diikuti dengan verb -ing?