7 sentences

1. 我父亲突然变得警觉。

   wǒ fù​qīn tū​rán biàn​de jǐng​jué.

   My father suddenly became alert.

   Source: CCMatrix

2. 他坐了起来，突然警觉。

   tā zuò le qǐ lai, tū​rán jǐng​jué.

   He sat up, suddenly alert.

   Source: CCMatrix

3. 我立刻变得更加警觉了。

   wǒ lì​kè biàn​de gèng​jiā jǐng​jué le.

   Immediately I became more alert.

   Source: CCMatrix

4. 他本应该更加警觉。

   tā běn yīng​gāi gèng​jiā jǐng​jué.

   He should have been more alert.

   Source: CCMatrix

5. 了解风险，保持警觉。

   liǎo​jiě fēng​xiǎn, bǎo​chí jǐng​jué.

   Know the risks and stay alert.

   Source: CCMatrix

6. 持续警觉和隐瞒让人精疲力尽。

   chí​xù jǐng​jué hé yǐn​mán ràng​rén jīng​pí​lì​jìn.

   The constant vigilance and concealment are exhausting.

   Source: CCMatrix

7. 我变得警觉起来，环顾四周，看看谁会站在旁边，等着攻击。

   wǒ biàn​de jǐng​jué qǐ lai, huán​gù sì​zhōu, kàn​kan shéi huì zhàn zài páng​biān, děng​zhe gōng​jī.

   I grew alert, and looked around to see who might be standing by, waiting to attack.

   Source: CCMatrix