问题追问

该题末尾为ing形式，为什么不选frightening?

解题思路： 如下
解题过程：
frightened 表"感到害怕饿"的意思, frightening 表"令人感到害怕的"的意思。 一般而言，物作主语时，用frightening；而人作主语时，用frightened。
–ed形容词和-ing形容词的区别
-ed形容词通常说明人，意为“(某人)感到……”；-ing形容词通常说明事物，意为“(某事物)令人……”或“令人……的(事物)”。这样成对的形容词有：interested / interesting; excited / exciting; frightened / frightening; surprised / surprising; pleased / pleasing; moved / moving; disappointed / disappointing等。
1. Laws that punish parents for their little children’s actions against the laws get parents ________.
A. worried B. to worried C. worrying D. worry
【分析】选A。表示人“感到忧虑的”用-ed形容词。句意：法律规定，行为触犯法律的儿童要由其父母接受法律的惩罚，这使得做父母的感到忧虑。
2. It is believed that if a book is ________, it will surely ________ the reader.
A. interested; interest B. interesting; be interested
C. interested; be interesting D. interesting; interest
【分析】选D。指书“有趣的”要用interesting而不用interested，
排除A和C；interest是动词，表示“使……感兴趣”。
注：即使-ed形容词用以说明事物，那也是指与该事物相关的人；即使-ing形容词用以说明人，也是指此人具有该性质或特征。如：
He told me the news in an excited voice.
The man is interesting.
另外，glad, happy, sorry, angry, thankful, proud等形容词的主语只能是人；而pleasant, easy, necessary, important等则通常以事物或it作主语，因为它们是说明事物的。如：
— I’m very ________ with my own cooking. It looks nice and smells delicious.
— Mm, it does have a ________ smell.
A. pleasant; pleased B. pleased; pleased
C. pleasant; pleasant D. pleased; pleasant
【分析】选D。pleased指“(人)感到高兴”，pleasant指“令人愉快的(事物)”。
最终答案：略