为什么是Most families have bought family cars over the years

为什么是Most families have bought family cars over the years 拥有汽车的人数最近几年增加了的英文 of people who have cars over the years. most family have their own cars in our town now同意 have been arrested over the years 翻译 I___the bike for over four years,A.have bought B.have buy C. I have bought the bike和I have bought the bike for two years, 为什么是in the past three years而不是over the past three years She have bought the computer since three years ago I have bought the computer for two years.怎么改? The Smiths have been here for over ten years 为什么用“been here” 英语翻译Most American families are smaller than the families in Most American families are smaller than the families in othe