这个英语句子改否定句？
1：jim has alredy come to schod late
2: ton alwoys come to schod late
3: I think there is going to be an english test next week
麻烦大家帮我改下否定句，这个我是按照本子上抄的 不知道哪个地方抄错了，请大家帮我改下！
参考答案:1. Jim hasn't yet come to school late.
2. Tom seldom comes to school late.
3. I don't think there is going to be an English test next week.