put on a long face

• vi. 板起面孔(悉眉苦脸)

put on a long face的用法和样例：

例句

用作不及物动词 (vi.)

1. When I twitted him about his hair,his face froze over.
   当我取笑他的头发时，他就板起面孔来。
2. The sight that met my eyes made it hard to keep a straight face.
   映入眼帘的情景使我难以板起面孔。