3 sentences

1. 时间本身似乎停滞不前。

   shí​jiān běn​shēn sì​hū tíng​zhì​bù​qián.

   Time itself seems to stand still.

   Source: CCMatrix

2. 你不想停滞不前。

   nǐ bù​xiǎng tíng​zhì​bù​qián.

   You do not want to stagnate.

   Source: CCMatrix

3. 如果你们的关系停滞不前，考虑给她一些空间。

   rú​guǒ nǐ​men de guān​xi tíng​zhì​bù​qián, kǎo​lǜ gěi tā yī​xiē kōng​jiān.

   If your relationship has stalled, consider giving her some space.

   Source: CCMatrix