原级：tough
比较级：tougher
toughing的反义词
最高级：toughest
第三人称单数：toughs
第三人称复数：toughs
过去分词：toughed
过去式：toughed
1. toughing的解释
1. While Gao is toughing it out, a fellow trader surnamed Jiang has had enough and may return to China.