I'm not good at speaking well of others. 我不大擅长称赞别人。

　　Don't speak ill of him. 不要说他的坏话。

　　Don't speak ill of the dead. 不要说死人的坏话。

　　My father spoke highly of President Kennedy. 我爸爸高度评价了肯尼迪总统。

　　They certainly speak well of him there.  他们当然会为他说好话的。

　　That's because he did a great job for them.  那是因为他为他们做了不少工作。