Try to complete the sentences Using present perfect tenses (has/have and the past participle) 1.He ______ (not/walked) the dog yet 2.______ they ______ (arrive) school? No,they 3.Chloe ______ (enjoy) staying with you 4.she ______ (sleep) three times today 5.the teacher _______ (give) all the books back 6.the postman ________ (knock) on the door twice 7.i _______ (see) a shark in the sea 8.i _______ already _______ (ate) all my dinner 9.the cat _______ (walk) out the door 10.philip ______ (be) very good in class today 11.________ you ever ______ (be) to america 12.natalie ______ (spoke) about this before 13. my sister _______ (not/start) school yet 14. it _______ (rain) all day today 15.the weather _______ (be) terrible this summer​