bird鸟[b??d]Thereisabird.有一只鸟。Let’slearnPresentationduck鸭[d?k]Let’slearnTherearesomeducks.那有几只鸭子。tree树；树木[t?i:]Thereisabirdinthetree.树上有一只鸟。Let’slearnthirteen十三[?θ???ti?n]Let’slearnfourteen十四[?f???ti?n]fifteen十五[?f?f?ti?n]sixteen十六[?s?ks?ti?n]Let’s