他总是在晚餐时滔滔不绝地说教，讲些人生大道理，让大家都感到厌烦。

He always ___sermonises about life lessons during dinner, boring everyone at the table.

我讨厌他每次见面都要说教，好像他什么都知道似的。

I hate how he always ___sermonises every time we meet, as if he knows everything.