不知好歹

不知好歹
[bù zhī hǎo dǎi]
unable to differentiate good from bad (idiom)
not to know what's good for one
unable to recognize others' good intentions

简体中文>英语, CC-CEDICT

不知好歹
bùzhī-hăodăi
= 不识好歹

- 简体中文>英语, 汉英词典

不知好歹
bùzhī-hǎodǎi
<熟> not know good from bad; not know chalk from cheese; not know kindness from malice
另见主词条：不知

不知好歹
be unable to tell what's good (or bad) for one; not know chalk from cheese
另见主词条：好歹

- 简体中文>英语, 汉英大词典