他总是丢三落四的，常常找不到自己的东西。
tā zǒngshì diū sān luò sì de ， chángcháng zhǎobùdào zìjǐ de dōngxī 。
He is always forgetful and often can't find his own things.
在考试的时候，丢三落四会影响你的成绩。
zài kǎoshì de shíhòu ， diū sān luò sì huì yǐngxiǎng nǐde chéngjì 。
Being scatterbrained during the exam can affect your grades.
如果你丢三落四，就需要更加注意自己的事情。
rúguǒ nǐ diū sān luò sì ， jiù xūyào gèngjiā zhùyì zìjǐ de shìqíng 。
If you are forgetful, you need to pay more attention to your matters.