问题描述：
下列句子改为否定句、肯定句和一般疑问句,英语高手们速度了
We are happy（改为否定句、肯定句和一般疑问句）
She goes to school at seven o`clock(改为否定句、肯定句和一般疑问句)
They play football in the afternoon(改为否定句、肯定句和一般疑问句)
肯定句不是原句。是有YES。否定句有些是用NO
We are happy（改为否定句、肯定句和一般疑问句）
She goes to school at seven o`clock(改为否定句、肯定句和一般疑问句)
They play football in the afternoon(改为否定句、肯定句和一般疑问句)
肯定句不是原句。是有YES。否定句有些是用NO
问题解答：
我来补答展开全文阅读