Sentence examples for sincere instructions from inspiring English sources

Thanks to Professor Gu'an Luo, Associate Professor Yuanyuan Hou and Lecturer Min Jiang and Chunfeng Xie, for their sincere instructions and help.

"But sincere".

Is he sincere?

Was it sincere?

The question is sincere.

This devotion is sincere.

"It is not sincere.

Was the president sincere?

This letter is sincere.

Our Sincere Condolences.

The director is sincere.