1. It is two years since I left school. (Çб³¸¦ ³ª¿Â Áö 2³âÀÌ µÇ¾ú´Ù) 2. He has learned a lot since he has been here. (±×´Â ÀÌ°÷¿¡ ¿À°í ³ª¼ºÎÅÍ´Â ¸¹Àº °ÍÀ» ¹è¿ü´Ù) 3. Since we live in the computer era, you should get used to personal computers. (¿ì¸®´Â ÄÄÇ»ÅÍ ½Ã´ë¿¡ »ì°í ÀÖÀ¸´Ï±î PC¸¦ ÀÍÈ÷µµ·Ï ÇØ¾ß ÇÑ´Ù) 4. I've been doing this work since I retired. (ÀºÅðÇÏ°í ³ª¼ºÎÅÍ ³»³» ÀÌ ÀÏÀ» °è¼ÓÇØ ¿À°í ÀÖ´Ù) 5. He went over to Italy five years ago and I haven't heard from him since. (±×´Â 5³âÀü¿¡ ÀÌÅ»¸®¾Æ·Î °Ç³Ê°¬´Âµ¥ ±× ÀÌÈķδ ±×¿¡°Ô¼ ¼Ò½ÄÀ» µéÀº ÀûÀÌ ¾ø´Ù)