What words are the correct form of the verb be?

it's depend of your sentence if it singular or plural.

ex: PLURAL

1. My houses, like other Muslim houses (be) built differently.

ans;

My houses, like other Muslim houses (have been) built differently.

ex: SINGULAR

2. President Gloria Arroyo who is the daughter of president DiOSdado Macapagal (be) the fourteenth president if the Philippines.

ans:

President Gloria Arroyo who is the daughter of president DiOSdado Macapagal (is) the fourteenth president if the Philippines.