関連ワード:  basic structure of present perfect continuous tense    structure of present perfect continuous tense    structure of present perfect continuous tense with examples    structure of present perfect continuous tense interrogative    structure of present perfect continuous tense negative    structure of present perfect continuous tense in passive voice    structure of present perfect continuous tense interrogative negative    structure of present perfect continuous tense affirmative    structure of present perfect continuous tense negative sentence    structure of present perfect continuous tense affirmative negative and interrogative  
結果 : basic structure of present perfect continuous tense