They have been collecting shells for there years.（改为同义句）Has Tom been skating for hours?(做否定回答）My mother has been collecting stamps for about ten years.(向画线句子提问）

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Theyhavebeencollectingshellsforthereyears.（改为同义句）HasTombeenskatingforhours?(做否定回答）Mymotherhasbeencol

They have been collecting shells for there years.（改为同义句）Has Tom been skating for hours?(做否定回答）My mother has been collecting stamps for about ten years.(向画线句子提问）
They have been collecting shells for there years.（改为同义句）
Has Tom been skating for hours?(做否定回答）
My mother has been collecting stamps for about ten years.(向画线句子提问）

They have been collecting shells for there years.（改为同义句）Has Tom been skating for hours?(做否定回答）My mother has been collecting stamps for about ten years.(向画线句子提问）
1.They have been collecting shells since three years ago.
2.No,he hasn't.
3.What has your mother been collecting for about ten years?
不明白的再问哟,请及时采纳,多谢!

1. They have been collecting shells since three years ago.
2.No, he hasn't
3.What has your mother been collecting for about ten years?

1. They collected shells three years ago.
2. No, he hasn't.
3. 哪个划线?

Where have they been? They have a____ been there what have they been doing 是什么时态 What places have they been?怎么翻译? where have they been?是现在完成时吗? they have been in kate's for they have been the subject of debate they have been acting up more lately they have been there before.so have i they have been there before.(),() 改为同义句 They have been here once.把been换成came怎么样 they said they have been married for ten years They have never been opened.为什么不可以是They never have been opened. they have been here since 1988,对1988进行提问,（）（）have they been here? They have been friends for 6 years. 改为同义句 They have been friends _______ _______. They have been skating for five hours 同义句 They have been skating_______ _____ ________ ______ Where have they been?能不能说：They have been in their room. How long__?Do you know?A have they married B have they got married C have they been marriedD have they been married to 他们结婚十年了 They have been married for ten years 为什么要用have been