一般疑问句:Has the foreign teacher come here since 2000? 否定句:The foreign teacher hasn't come here since 2000. 一般疑问句:Has this film already begin? 否定句:This film hasn't begun yet.
Has the foreign teacher come here since 2000 ? The foreign teacher hasn't come here since 2000. Has the film begun already? This film hasn't begun yet.