sandy's parents were at home last night.(改为否定句)

问题描述:

sandy's parents were at home last night.(改为否定句)

把were改成weren't.

谓语动词是be动词过去式were,在它后面加not 就构成否定了

正确答案是
Sandy's parents weren't at home last night.

Sandy's parents weren't at home last night.