Kanji
1. house; building
2. roof
1. Of the house; Relating to the house
1. At the shop; In the shop
1. Is a house.; It is a house.
1. Was a house; Used to be a house
1. Not a house.; It's not a house.
1. If/when a roof; If it's a roof
1. It was a house.; It used to be a house.