by oneself= alone 혼자서
She lives by herself.
for oneself= without other's help 혼자 힘으로
She studied English for oneself.
of oneself= automatically, 자동발생적으로, 저절로 spontaneously
The light went out of itself at the very time.
beside oneself= mad, crazy 제 정신이 아닌
in spite of oneself= unconsciously 무의식적으로
to oneself= not to be shared, 독점하여, 혼자서
between ourselves= between you and me 이것은 비밀인데