4 sentences

1. 大病初愈，他感到全身无力。

   dà​bìng chū yù, tā gǎn​dào quán​shēn wú​lì.

   Having just recovered from a serious illness, he felt weak all over.

   Source: Dong Chinese Dictionary

2. 大病之后，他感到全身软弱无力。

   dà bìng zhī​hòu, tā gǎn​dào quán​shēn ruǎn​ruò wú​lì.

   After a serious illness, he felt weak all over.

   Source: Dong Chinese Dictionary

3. 经此一战，敌军气势已敝，无力再战。

   jīng cǐ yī zhàn, dí​jūn qì​shì yǐ bì, wú​lì zài zhàn.

   After this battle, the enemy's spirit was broken and they were unable to fight on.

   Source: Dong Chinese Dictionary

4. 面对巨额医疗费，他感到无力承担。

   miàn​duì jù'é yī​liáo​fèi, tā gǎn​dào wú​lì chéng​dān.

   Faced with huge medical expenses, he felt unable to afford them.

   Source: Dong Chinese Dictionary