原级：tough
toughing的反义词
比较级：tougher
最高级：toughest
danci.911cha.com
第三人称单数：toughs
第三人称复数：toughs
过去分词：toughed
toughing
过去式：toughed
1. While Gao is toughing it out, a fellow trader surnamed Jiang has had enough and may return to China.