They was a car in front of the house just now.的肯,否定句

问题描述:

They was a car in front of the house just now.的肯,否定句

句子有误,原句应该是:There was a car in front of the house just now.
它本身就是肯定句.
其否定句为:There wasn't a car in front of the house just now.
其一般疑问句为:Was there a car in front of the house just now?