曲言是语言学的修辞手法。不是委婉语，也叫间接肯定法,反语法，或保守的陈述, 掩饰【Litotes or Understatement】
1、 轻描淡写 ( 用rather, quite, pretty, almost, a bit代替very )
She’s rather good-looking. He has written quite a number of novels. My friend was a bit upset by his son’s death. She was a little annoyed when she found her valuable vase broken.
2、 用反说代替正说 ( 常用含蓄的否定的方式，常使用no, not, never, none, little, hardly等)
The man is no fool. He has no small chance of success. I couldn’t be happier.
His teacher said he wasn’t very bright and that he wasn’t worth teaching.
He conducted the experiment with no little enthusiasm. Similar mistakes are not uncommon.
3、 弦外之音 (婉转说法，用于代替直言不讳)
The beauty of Guilin is more than I can describe. You should have been here earlier.