1. The store will shut down at the end of April, or sooner if all the merchandise sells out.2. The store will close down at the end of April, or sooner if all the merchandise sells out.3. J.C. Penney will close its store in Tampa Bay.4. This store is closed permanently.
 shut down close down close closed permanently停止營業 = shut down = close downclosed 通常指商家暫時關門，明天還會開門，除非有上下文表明指停止營業，如:J.C. Penney will close its store in Tampa Bay.This store is closed permanently.這些例句中的 close 表示關門大吉。
All the work I've been putting into this project has been all for nohing because my boss is shutting it down.