"my mother has a lot of housework to do every week"中为什么用"to do",而不用"do"

My mother has ___friends .A a lot Blot of Clots of Da lots of 请 My mother has a lot of ()(worry) and she is always ()(worry)about me My mother has a lot of things to do every day___ ___ a lot of things to do ___ my mother every day my mother has a lot of housework to do every week中为什么用to do,而不用do My mother has __to do every day. A.a lot of works B.a lot of work C.many work D.some works 英语高手指点迷津my mother has a lot of things to do every day.(改为同义句）（）（）a lot of things to do ()my mother every day. My mother does a lot of housework before going to work,but she has never been late.—— ＿＿A.So does my mother B.Neither does my mother C.Nor has my mother D.So it is with my mother my mother does a lot of housework.改为否定句 My mother does a lot of housework.改为否定句 My mother likes work a lot.怎么解释 my mother has a brother ,he is my u------- my life has changed a lot中的has changed a lot是什么语啊 My mother likes sleeping______(a lot ,a lot of)on weekeng. my hometown has changed a lot.同义句 My life has changed a lot 划分句子成分 My father and mother ------- a son.用have 还是has. my mother has a good m though she is 70 My mother has a baseball bat.（改为一般疑问句）