假设英文

英语中表示假设的句子主要是虚拟语气，其表示方式有：1.以if条件从句为虚拟语气标志： 与现在事实相反 从句时态用一般过去时（be用were),主句用过去将来时例如：If I were you, I would finish homework first. 与过去事实相反 从句用过去完成时，主句用过去将来完成时例如：If I had gone there, I would have bought two tickets. 与将来事实相反 从句用一般过去时或过去将来时，主句用过去将来时例如：If he had/would have time, he would come to your birthday party tomorrow.2.以even if/though让步从句为虚拟语气标志 主从句时态同if条件从句相同例如：He might give you more help, even though he were/was very busy.3.以as if/though引导的表语从句或状语从句为虚拟语气标志 主从句时态同if条件从句相同例如：It seems as if he had known the news.4.以wish后的宾语从句为虚拟语气标志 与现在事实相反 从句时态用一般过去时（be用were)例如：I do wish I knew more about the subject. 与过去事实相反 从句用过去完成时例如：I wish I had seen you yesterday. 与将来事实相反 从句用过去将来时例如：I wish you wouldn't smoke any more.

我认为是 assume 我在计算机语言里 见到的都是 assume 只是个人认为 ，并不十分确定~

假设suppose

if比较常用吧，要注意主将从现，当然后面是祈使句的话就算了。If the goods have been used up,please tell me right now.

英语中表示假设的句子主要是虚拟语气，其表示方式有：

1.以if条件从句为虚拟语气标志：

与现在事实相反 从句时态用一般过去时（be用were),主句用过去将来时

例如：If I were you, I would finish homework first.

与过去事实相反 从句用过去完成时，主句用过去将来完成时

例如：If I had gone there, I would have bought two tickets.

与将来事实相反 从句用一般过去时或过去将来时，主句用过去将来时

例如：If he had/would have time, he would come to your birthday party tomorrow.

2.以even if/though让步从句为虚拟语气标志 主从句时态同if条件从句相同

例如：He might give you more help, even though he were/was very busy.

3.以as if/though引导的表语从句或状语从句为虚拟语气标志 主从句时态同if条件从句相同

例如：It seems as if he had known the news.

应用条件

在表示假想的虚假的、与事实相反的或难以实现的情况时用虚拟语气，表示主观愿望或某种强烈情感时，也用虚拟语气。即当一个人说话时欲强调其所说的话是基于自己的主观想法，愿望，假想，猜测，怀疑或建议，而不是根据客观实际，就用虚拟语气。主要是英语语法的一种表达。