had to be built.built不是v吗?为什么在be后

had to be built.built不是v吗?为什么在be后 to be built是什么结构 be built like a The bridge is supposed to be built to be built是定语 向高手请教下Birds are built to fly Be built to Be built for的意思? Never be afraid to try something new.Remember,amateurs built The platform built will be used to perform on 英语翻译but such projects must be built to higher specifications The place___the bridge is supposed to be built should be___t Never be afraid to try,remember...Amateurs built The place__the bright is supposed to be built should be___th