判断时态Analyze the following sentences to see what tenses they belong to.P表示一般过去时态，PP表示现在完成时态1) I've only been here for ten minutes or so.2) Ted has always worked in an accounting department.3) Mark has worked for this large company for many years.4) John graduated from Florida State University in 1990.5) We had the same weather in Detroit last year.6) He has never made a serious mistake at work.7) What has the weather been like recently?8) Robert went to school part-time while he worked full time.9) Robert has received two promotions so far.10) Robert has decided to look for a job in a larger company.