3 sentences

1. 我就知道你会疑心。

   wǒ jiù zhī​dào nǐ huì yí​xīn.

   I knew you'd be suspicious.

   Source: OpenSubtitles

2. 我疑心他根本没打算来。

   wǒ yí​xīn tā gēn​běn méi dǎ​suàn lái.

   I suspect that he has no intention of coming at all.

   Source: Dong Chinese Dictionary

3. 你不要对他起疑心。

   nǐ bù yào duì tā qǐ yí​xīn.

   Don't become suspicious of him.

   Source: Dong Chinese Dictionary