他真傻，居然不明白这个问题。
tā zhēn shǎ ， jūrán bù míngbái zhègè wèntí 。
He is really foolish; he actually doesn't understand this question.
你怎么可以那么傻，把钱给一个陌生人？
nǐ zěnme kěyǐ nàme shǎ ， bǎ qián gěi yígè mòshēngrén ？
How could you be so foolish as to give money to a stranger?
傻瓜才会相信那些不真实的故事。
shǎguā cái huì xiāngxìn nèixiē bù zhēnshí de gùshì 。
Only a fool would believe those unreal stories.