While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are
now using their mobile phones to make calls across a wide region at night and on weekends, when numerous wireless companies provide unlimited airtime for a relatively small monthly fee.
比如,这一题我们讨论的是现在完成时可不可以和in the last year连用,结论是可以。但我并没有说一般过去时不可以连用in the last year。至于past和last在语法书上,在讲述关于现在完成时的时候,就是in the past(last)few year。
我觉得这样的论述有问题~~~~in the last year不能接完成时~~~~in the past few years 则可以~~~问题的关键是~~in 后面是不是跟大段的时间概念~~~~如果是跟大段的时间概念~~才能够用完成时~~~~所以这也就是为什么in the last century可以跟完成时的原因~~~~