神马品牌网现在高州四中校长:改否定句
来源：百度文库 编辑：神马品牌网 时间：2024/05/03 06:12:13
He has already written two letter since yesterday
My mother had prepared lunch by 11;30
否定句怎么改，顺便问一下，by 11;30是什么意思
My mother had prepared lunch by 11;30
否定句怎么改，顺便问一下，by 11;30是什么意思
He hasn't written two letters since yesterday.
My mother hadn't prepared lunch by 11:30.
By 11:30 = at 11:30
He hasn't wrote any letter since yesterday
My mother hadn't prepared luch until 11:30
by 11:30, 11点半之前
在否定句不可以用这个，要换until
by 11;30是到11点半的意思
He has not already written two letter since yesterday
My mother had prepared lunch by 11;30