1 the past participle of GET get的过去分词
2 In American English, is the usual past participle of . is not used as the past participle for meaning ‘must’. Speakers of American English say rather than . got to In British English, is not used. The past participle of in British English is . 在英国英语中不用 gotten,英国英语中 get 的过去分词是 got
gotten get gotten got to had to had got to gotten get got