形容词常用后缀：-ful, ent, -less, -able, -ible, -ic, -ive, -ish, -al, -ous, -ly, -ate 等。
-ful harmful有害的，truthful真实的，helpful有帮助的，hopeful有希望的，wonderful精彩的
Smoking is harmful to health.
吸烟有害健康。
A truthful report has revealed the harmful effects of smoking on health.
一份真实的报告揭露了吸烟对健康的有害影响。
Publicity is helpful in raising public awareness of the harmful effects of smoking on health.
宣传有助于提高公众对吸烟对健康有害影响的认识。
It is hopeful that increasing numbers of people will come to realize the harmful effects and quit smoking.
希望越来越多的人意识到吸烟的有害影响并戒烟。
It is a wonderful world where people quit smoking since they cherish their own health and that of others.
人们戒烟，因为他们珍惜自己和他人的健康，这才是一个美好的世界。
