Question

he does hishomework at home. (改为否定句） she was at home yesterday. (改为一般疑问句)

Answer 1

第一句：因为does是实意动词，用的第三人称单数，所以在does前面加doesn't
，并且把does还原为do。改为：he
doesn't
do
his
homework
。
第二句：因为句子中已经有了be动词，所以直接把was提前。改为：was
she
at
home
yesterday。
希望采纳。