同学你好，该知识点来自沪江网校《新概念英语第三册【随到随学班】》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。

同学好：
be under the impression that ... 中，be 的时态由上下文决定，和that 从句的时态没有必然联系。如：

Consumers may be under the impression that high fees can make bridge loans costly.
消费者会认为过渡贷款的高额费用会造成成本增加很大。
I was under the impression that if someone did something I didn't like, or a situation evolved that I wasn't happy with, then I had the right to be disappointed.
我一直抱着这样的想法，如果有人做了我不喜欢的事，或形势发展不如我所愿，我就有“权力”失望。

祝学习愉快～