My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean?

My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean? I am with my sister等于my sister and 英语翻译My sister and I ___________reading. My sister and I like (run) My sister and I ( ) in the ( ) room. my sister and I ___a fun day my sister and I ___a fun day And I have to take care of my sister用过去式怎么变把句子变成过去式 They are my parents,my sister,my brother and I. sing,my,i,sister,and,dance,and怎么连成句子 I am with my sister为什么加am I and my sister怎么不加 英语I am not like my sister句型转换My sister and I　are___. my sister and i are students的同义句（）my sister ()i are students Take my sister in law I had to stay home and look after my sister 我和姐姐 MY SISTER AND I怎么样 i speak to my sister about u and me I'm Lucy and my ()sister is Lily