1、grateful 核心詞匯
英 ['ɡre?tfl] 美 ['ɡre?tfl]
adj. 感激的；令人愉快的
I can't express how grateful I am.
我說不出我有多麽感激。
2、fearful 常用詞匯
英 ['ffl] 美 ['f?rfl]
adj. 擔心的；可怕的；<口>非常的
They were fearful that the river would flood.
他們擔心河流會發洪水。
3、careful 基本詞匯
英 ['ke?fl] 美 ['kerfl]
adj. 小心謹慎的；慎重的；精心的
Be careful in dealing with such people.
與這種人打交道要小心謹慎。