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

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 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 he's at home.(否定句) he isn't at school i think he -----be ill 英语合为一句 he doesn't like staying at home.I think I think she is at home 变否定句 I think she is good at listening.改为否定句! I'm not sure of that ,And I think he is probably at home .此句 l think Tom is at home改为否定句 l（）think Tom （）at hom I think he is right.(改为否定句）I（）（）he is right.帮下忙啊