3 sentences

1. 我对他所说的话毫不怀疑。

   wǒ duì tā suǒ shuō de huà háo bù huái​yí.

   I have no doubt at all about what he said.

   Source: Dong Chinese Dictionary

2. 对此我毫不怀疑。

   duì cǐ wǒ háo bù huái​yí.

   Of that I have no doubt.

   Source: OpenSubtitles

3. 我毫不怀疑。

   wǒ háo bù huái​yí.

   I have no doubt.

   Source: OpenSubtitles