同学你好，该知识点来自沪江网校《英语零基础直达大学六级【年中特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
We had been in the hat shop for half an hour and my wife was still in front of the mirror.
这里had been是发生在另一个过去状态was still in front of the mirror之前的，是过去的过去，所以用了过去完成时。

say后面要加宾语，所以要加it
almost 几乎
at once 立刻
almost at once 几乎立刻
almost at once是个习惯搭配，不用nearly替换。

I needn't remind you of that terrible tie you bought yesterday.
(that) you bought yesterday是定语从句，修饰tie的，其中关系词that指代tie，作bought的宾语，省略了。

祝同学学习进步~