i think art is not so useful as science这句话正确吗

i think art is not so useful as science这句话正确吗 i think science is more useful than art.I disagree.i think a i think science is more useful than art.--i disagree,i think This dictionary is not as/so useful as you think I don't think maths is not ____ science A so easy as B less i think art is ___interesting than science 英语：This dictionary is not as/so useful as you think. I think art is not as important as Chinese.(改为同义句) Art is not as important as chemistry,I think.(同义句）Chenistry I think physics is so useful as maths是不是错了? I think math is not as interesting as English有语法错误吗,这与think的 I think English is so popular as French这句话怎么错了?急!