3 sentences

1. 这把刀太钝了，切不动肉。

   zhè bǎ dāo tài dùn le, qiē bù​dòng ròu.

   This knife is too dull to cut the meat.

   Source: Dong Chinese Dictionary

2. 闹钟响了半天，他还是躺在床上一动不动。

   nào​zhōng xiǎng le bàn​tiān, tā hái​shi tǎng zài chuáng shàng yī dòng bù​dòng.

   The alarm clock rang for ages, but he still lay in bed without moving.

   Source: Dong Chinese Dictionary

3. 这种老式挂锁的牡断了，钥匙怎么也转不动。

   zhè zhǒng lǎo​shì guà​suǒ de mǔ duàn le, yào​shi zěn​me yě zhuàn bù​dòng.

   The bolt of this old-fashioned padlock is broken, and the key won't turn.

   Source: Dong Chinese Dictionary