Word: 弄丢 (nòngdiū)

他把书弄丢了。

Tā bǎ shū nòngdiū le.

He lost the books.

他把那两本书弄丢了。

Tā bǎ nà liǎng běn shū nòngdiū le.

He lost those two books.

他转眼就把钥匙弄丢了。

Tā zhuǎnyǎn jiù bǎ yàoshi nòngdiū le.

In the blink of an eye, he had lost the keys.

别把你的东西弄丢了。

Bié bǎ nǐ de dōngxi nòngdiū le.

Don't lose your stuff.

我们弄丢了的话，怎么办？

Wǒmen nòngdiū le dehuà, zěnmebàn?

If we've lost it, what'll we do?

我把钱包弄丢了。

Wǒ bǎ qiánbāo nòngdiū le.

I lost my wallet.

我没有把我的手机弄丢。

Wǒ méiyǒu bǎ wǒ de shǒujī nòngdiū.

I didn't lose my phone.

护照要牢牢收好，别弄丢了。

Hùzhào yào láoláo shōu hǎo, bié nòngdiū le.

Keep your passport safely put away and don't lose it.

请保留好原始发票，别弄丢了。

Qǐng bǎoliú hǎo yuánshǐ fāpiào, bié nòngdiū le.

Please keep the original receipt and don't lose it.

钥匙请妥善保管，别弄丢了。

Yàoshi qǐng tuǒshàn bǎoguǎn, bié nòngdiū le.

Please take good care of the key and don't lose it.