主动语态
一般现在时是build，builds
一般过去时built
一般将来时 will build
过去将来时would build
现在进行时am/are/is building
过去进行时was/ were building
现在完成时 has built
过去完成时 had built
被动语态
一般现在时am/are/is built
一般过去时was/ were built
一般将来时 will be built
过去将来时would be built
现在进行时am/are/is being built
过去进行时was/ were being built
现在完成时 has been built
过去完成时 had been built
