5 sentences

1. 螺丝钉松了，需要拧紧。

   luó​sī​dīng sōng le, xū​yào níng​jǐn.

   The screw is loose and needs to be tightened.

   Source: Dong Chinese Dictionary

2. 他用螺丝刀把螺丝拧紧了。

   tā yòng luó​sī​dāo bǎ luó​sī níng​jǐn le.

   He tightened the screw with a screwdriver.

   Source: Dong Chinese Dictionary

3. 他用力拧紧了闹钟的发条。

   tā yòng​lì níng​jǐn le nào​zhōng de fā​tiáo.

   He wound the alarm clock tightly.

   Source: Dong Chinese Dictionary

4. 请把瓶盖拧紧。

   qǐng bǎ píng​gài níng​jǐn.

   Please screw the bottle cap on tight.

   Source: Dong Chinese Dictionary

5. 他用钳子拧紧了松动的铁丝。

   tā yòng qián​zi níng​jǐn le sōng​dòng de tiě​sī.

   He used pliers to tighten the loose wire.

   Source: Dong Chinese Dictionary