G：It’s so great seeing you guys again.

C：Yeah.

B：I agree.

C：I can’t believe it’s been twenty years since we were all in college together.

G：Yeah, you know, that’s my best memory. That peace demonstration. (Yeah) You know, somehow getting arrested for something you believe in isn’t … isn’t scary at all.

C：No, it isn’t at all.

B：You’re right.

C：But it did help that there were five hundred other students getting arrested along with us.

B：That was a great day, though.

G：Hey, hey, you all remember our last day of college?

B：What, you mean graduation?

C：Graduation, what’s to remember? None of you went to graduation. I didn’t go.

what’s to remember? 查阅了一些资料，有表示“计划”、“安排”、“义务”、“应该”、“可能”、命运”等，还有一种表示，不定式做表语，表示主语和表语在概念上是等同的。那么，如何理解的be to do结构用法。