was/were supposed to

was/were supposed to 常常用来把本应该发生的事与实际发生的事进行对照,可译为“本应该”:

1. We were supposed to arrive at six. But we are late. 我们本应该6点钟到达。但是，我们迟到了。

2. Lucy was supposed to come to lunch. What's happened? 露西本应该来吃午饭。出什么事了？

在这种情况下,有时使用 was/were supposed to have done 来表示“过去本应该发生而实际上并未发生的事。”:

1. He was supposed to have told me about it. 他本应该把这件事告诉我的。

2. Mrs. Brown was supposed to have left for Italy last week. 布朗太太本应上周动身去意大利的。

[句意]“你本来会像这样死去的。你死后,没有一个医生能从你的皮肤上看出蛇咬的细小齿痕……”