had to be built.built不是v吗?为什么在be后

had to be built为啥加had?site had to be found for it andpedestal had to be built.had是做什么的?是had还是had to had to be built.built不是v吗?为什么在be后 She__the door before she goes away.A had locked B is locking C has locked D was lockingIt is high time you__in bed nowA are B were C will be D would beThe bridge which__last year looks really beautiful.A was built B built C was set up D had been buil the building ( ) next month will be a modern hospitalA.built B.being built C to be built D be built He said a new hospital ( ) in two weeks.a.will be built b.would be built c.had built d.was built答案是什么,又是为什么呢? The bridge ___ next year will be very long.A.being built B.to be built C.built D.buildingThe bridge ___ next year will be very long.A.being built B.to be built C.built D.building The magnificent museum is said ___about a hundred years ago.A.to be built B.to have been built C.to have built D.to have being built The bridge is supposed to be built to be built是定语The bridge is supposed to be builtto be built是定语还是状语?理由 向高手请教下Birds are built to fly Be built to built to to后面到底什么时候才加be?took almost every means she could find to practise these high notes.a site had to be found for it and pedestal had to be built.上面这2句话中,为什么第一个find to 后面没有加be啊?she did not want to b Never be afraid to try,remember...Amateurs built The stone bridge __ _ last year is very beautiful.A.built B.was built C.being built D.to be built Although ____ thirty years ago,the house looks very beautiful.(build)答案上给的是 built我不明白为什么不能填 to be built或being built以及 to be built being built Many people would't like their good farmland A.to be built B.built C.to be built on D build on请说明原因 The factory ______ next year will be one of the largest in this city.a.to build b.to be built c.being built d.having been built has still been biult还是has been still built?is still to be built还是 is to be still built?still 放什么位置? had to be hard for