[译] 吉姆夸耀自己的学习成绩。
[误] Jim boasts his grades in school.

[正] Jim boasts about his grades in school.
[注] 动词 boast (= speak too highly of oneself) 作“夸耀”解时是不及物动词，后面须跟介词 of 或 about，又如：Some young people boasted of what their parents had done. 有些年轻人夸耀父母的成就。boast (= have sth. to be proud of) 作“自豪”解时为及物动词。如：The town boasts a lot of hot springs. 那座城镇以多温泉而自豪。