4 sentences

1. 我想我该心存感激吧。

   wǒ xiǎng wǒ gāi xīn​cún gǎn​jī ba.

   I guess I should be grateful.

   Source: OpenSubtitles

2. 你应该心存感激。

   nǐ yīng​gāi xīn​cún gǎn​jī.

   You should be grateful.

   Source: OpenSubtitles

3. 我仍旧心存感激。

   wǒ réng​jiù xīn​cún gǎn​jī.

   I'm still grateful.

   Source: OpenSubtitles

4. 自从你告诉我之后，我就一直心存疑虑。

   zì​cóng nǐ gào​su wǒ zhī​hòu, wǒ jiù yī​zhí xīn​cún yí​lǜ.

   Ever since you told me, I've had doubts.

   Source: OpenSubtitles