精品偷拍一区二区三区,亚洲精品永久 码,亚洲综合日韩精品欧美国产,亚洲国产日韩a在线亚洲

  • <center id="usuqs"></center>
  • 
    
  • The book had been sold out when I got to the bookstore yesterday afernoon.

    The book had been sold out when I got to the bookstore yesterday afernoon.
    The book【 had been sold out】 when I got to the bookstore yesterday afernoon.為什么不填has been sold out?因為從句中的got 可連接詞是when而不是before啊?
    英語人氣:355 ℃時間:2020-03-22 07:31:41
    優(yōu)質(zhì)解答
    這是過去完成時,而has been sold out是現(xiàn)在完成時,before既可以做介詞,又可以做連詞,意思是"在^之前".后面接句子時,是連詞,如:I had taught in that school before I moved here.before后面接單詞或者短語時,是介詞...
    我來回答
    類似推薦
    請使用1024x768 IE6.0或更高版本瀏覽器瀏覽本站點,以保證最佳閱讀效果。本頁提供作業(yè)小助手,一起搜作業(yè)以及作業(yè)好幫手最新版!
    版權(quán)所有 CopyRight © 2012-2024 作業(yè)小助手 All Rights Reserved. 手機版