Should have done... 本应该……

【用法透视】
这个句型表示本来应该做什么，但事实上没做成的事。

【支持范例】
1. She shouldn't have gone sightseeing.
她本不应该出去玩的。

2. We should have gone swimming, but it rained.
我们本来应该去游泳的，但下雨了。

3. We should have offered our help to him.
我们本来应该帮他忙的。

【会话记忆】
A: You should have been at home and enjoyed a big meal.
你本应该呆在家里享受丰盛大餐的。

B: Yes. I should have gone to buy the ticket in advance. But now...
是啊。我当时应该提前去买票的，但是现在……

A: But now you can stay with friends and enjoy a holiday too.
但是现在你可以与朋友一起过节。

B: Right. Let's go and find some fun.
对。走，我们找点儿快乐的事去。