When I was 15, my family moved to Washington. I tried skateboarding there, but the locals were far less welcoming. Within a couple of years, I'd given it up. [摘自2021全国卷甲,C]请问上面语境中的句子within a couple of years, I'd given it up为什么使用过去完成时态表达。...
We might even by a TV, we haven't had one for as long as we've been
living together.for后面应该是一段时间,那么怎么理解这里的as long as we've been living together是一段时间呢?是否省略了 for + some time
+ as long as we've been living together 呢?