Cliff and Bonnie have known each other for two years. 克里夫和帮尼彼此认识已有两年了. Nancy and Barry have been together for ten years.南西和巴里一在起已有十年了. Stacey and Jack have dated for some time. 史黛西和杰克约会已有一段时间了. Steve has worked at this company for only a short time. 史蒂夫在这家公司工作只有很短的时间. They have talked about getting married since last year. 自从去年以来,他们就在讨论结婚的事. He has been very busy since he started his new job. 自从他开始新工作后, 他就一直很忙. Since May,the price of bread has gone up three times. 自从五月以来,面包的价格已经涨了三次. They have been working on this project since last month. 自从上个月以来,他们就一直着手这项计划.