写出下列动词短语的现在完成结构 并造句.英语.

1.she has played the piano before 2.he has ever taught English 3.the Whites have lived in Beijing since 2 years ago 4.I have just eaten lunch 5.have they cleaned the classroom yet？ 6.my mother has worked here for 3 months 7.I have learned English/learnt English for six years 8.Mille and Amy have known Li Lei since they made friends with each other 偶不保证会有打错的地方啊~~~看着写的说。。。话说偶初二，刚刚学完这个时态的说……多奖点啊，，，咱可是冒着“生命危险”上的啊O(∩_∩)O~