have + pp (has) (過去分詞) Unit 7 Grammar (1) Present Perfect...
have + pp (has) (過去分詞) Unit 7 Grammar (1) Present Perfect Tense (現在完成式) have + pp (has) (過去分詞) A verb has “three tenses(三個時態)” : present tense past tense past participle (現在式) (過去式) (過去分詞) am/is was been are were been work worked worked change ch...