James cannot go fishing today
如果换一种形式,使它还是否定句： James can't go fishing today.
(解析： cannot = can't 不会,不能）
James cannot go fishing today变成疑问句： Cannot James go fishing today ?
James can go fishing today变成疑问句：Can James go fishing today ?
这句话是一般现在时;如果是一般过去时就将can 变为： could; can't- couldn't
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!