1．悲伤的：sad → heartbroken, depressed, frustrated
2．富有的：rich → wealthy, welloff
3．穷的：poor → needy, in poverty
4．开心的：happy → cheerful, delighted
5．聪明的：clever → smart, intelligent, sharpminded
6．苦难的：difficult → tough, challenging, stressful
7．巨大的：big → enormous, vast, massive
8．美丽的：beautiful → eyecatching, goodshaped, appealing, charming
9．最便宜的：the cheapest → the least expensive
10．害怕的：afraid → frightened, scared, panicstricken
11．不同的：different → various, diverse, a variety of
12．粗鲁的：rude → impolite
13．疲劳的：tired → worn out, exhausted
14．有益的：helpful → beneficial, profitable, rewarding
15．严重的：serious → severe
