there isn't a car in front of the building.改成一般疑问句

there isn't a car in front of the building.改成一般疑问句 there isn't a car in front of the building.改成一般过去时 There was a car in front of the house just now改成否定句,一般疑问句 There was a car in front of the house yesterday改成否定和一般疑问句（一起 There was an old car in front of the building ,in front of t There is a library in front of the teacher building 变一般疑问句 there were a car in front of the house just now 一般疑问句. There are many trees in front of the building.变为一般疑问句 lily is in front of the building (改为一般疑问句) there was a car in front of the house怎么变否定句、一般疑问句、肯定、否定句和现在式 there was a car in front of the house just now改为否定句,一般疑问句并作否 there was a car in front of the house jouse now 的否定句 一般疑问句 肯