I think he's at home.(否定句)

I think he's at home.(否定句) I think he is at home.改为否定句.为什么一定要改成I don't think he is at h 1.I think he is at home at moment.(改为否定句） I think he is at home now (改为否定句） I think she is at home 变否定句 几道英语问题.1.I think he is at home.(改为否定句）是I think he isn't at h I think he's so great.(改为否定句) He often reads at home否定句 .I think I'll stay at home and watch TV.(改为否定句) I think it's boring的否定句 He thinks it's boring的否定句 同义句转换：I think maybe he's at school I'm ( ) he's at school I think maybe he's at school 同义句