Couldn't is better in all of these cases, because its epistemic sense is very close to that of can, and epistemic could is not restricted to negative contexts like epistemic can. That can't be obama at the door, it's too early. 使命召唤8 现代战争3 运行游戏出现couldn't load image xp解决步骤，就是一：将iw_00.iwd改成iw_00.rar.二：用rar打开文件，将localized_english_iw00里的images里的所有文件加.
Female Supremacy Is Inevitable by NathanOfMatriarchy on DeviantArt
上古卷轴5 skse点开后却弹出couldn't find tesv.exe 该下的都下了 网上说了的基本都弄了 怎么还是打不开skse所有文件要放到上古卷轴5主目录下，和tesv.exe位于同一目. The sentence (a) isn't correct grammatically. 针对“魔兽世界进入游戏跳出the cas system was unable to initialize”的问题，以下是解决方案： 使用战网客户端启动游戏： 问题描述：此错误通常发生在直接通过魔兽世界的.
I couldn't open the door is in the past.
Are they almost the same? What is the difference between them? I hid the presents so that she couldn't find them. That couldn't be obama at the door, it's too early.
As a matter of fact, you are locked in and unable to open the door at the present time. I hid the presents so that she wouldn't find them. 第一个区别 时态在一般语句里面couldn't表过去时can't表现在时，can 是现在是.could 是过去式 第二个区别 could 比can 多一个意思就是情态动词 ,大概意思就是 couldnot 有个 委婉,这类的意.
