Tacoma Actors Guild, which suddenly shut down last month, has bought a little time. A suburban Seattle theatre will take over the theatre’s building for the next 2 1/2 years while TAG tries to regroup. Bellevue Civic Theatre, a semiprofessional compared to TAG’s fully professional status, will “hire actors and crew on a show-by-show basis. TAG’s staff might get occasional work, but will not be rehired.”