David has three nice backpack 怎样变否定句、一般疑问句、肯定否定回答,

David has three nice backpack 怎样变否定句、一般疑问句、肯定否定回答, David ____ Shanghai for more than three months.A.come to B.has been to C.has been in D.has come to为什么 David __ Shanghai for more than three months.A,came B,has been to C,has been in D,has come to 初一英语句子用“have,has“填空David （）some jackets.What do your friends（）?His brother（）a basketball.Her sister（）a nice doll. 19.David _______ Shanghai for more than three months.A.came to B.has been to C.has been in D.has come to 20.--- Is your father a Party member --- Yes,he ____ the party three years ago.He _____ a Party member for three years.A.joined; has been B.has j David ____ Shanghai for more than three months.A.come to B.has been to C.has been in D.has come to为什么,我只知道答案是BC之间,可是in和to有什么差别在这里 She has three children. 1】I have many CDs.(改为一般疑问句) _______you______many CDs?2】They have three hats.（改为否定句） They________ ________three hats.3】Tom has a nice backpack.（改为一般疑问句） _______Tom_______a nice backpack?4】He has a David eats ()A.good B.nice C.well D.OK David has a goal 改成一般疑问句 david has no time for school的同义句回答是 David has ( ) ( ) ( ) ( ) ( ) ( ) She has three children 就three 提问 He has three baseballs.(对three提问) He has three brothers.对 three提问 Mike has three basketballs对three提问 Helen has three notebook. 对three提问 john has a nice dog改为一般疑问句I want some fish改为否定句 we need three bags of salt 对画线部分提问 画线部分three what do you think of this book 改完同义句 David ____some of the original poems written by him in three minutesA has recited B will recite C is reciting D recited答案是B 请问这里的will是指将来时态意思吗 为什么这么用呢 多谢!