说真话

bù néng qī wàng tā shuō zhēn huà

不能期望他说真话。

He can't be relied on to tell the truth.

tā yǐ shàng dì de míng yì qǐ shì shuō zhēn huà

他以上帝的名义起誓说真话。

He swore by God to tell the truth.