difficult比较级是：more difficult
difficult
美 /ˈdɪfɪkəlt/
英 /ˈdɪfɪkəlt/
adj.
困难的；不随和的；执拗的
比较级 more difficult
最高级 most difficult
双语例句：
It is very difficult for me to learn a new language.
对我来说，学习一门新语言很难。
Small businesses struggle to survive in this difficult economic environment.
小企业在这种恶劣的经济环境中挣扎求生。
