IT seems that he is very tired.是不是即可做主语从句又可做表语从句

it seems that he is ill与it seems that he were ill 的区别? It seems that he is very happy today等于什么 It seems that he is unhappy 同义句He___to___unhappy. it seems that he is very handsome.同义句 同义句It seems that he is ill He seems ____ ___ill [同义句} It seems that he is quite happy的同义句＿seems __ __quitehappy It seems that he is happy.改为同义句（提示：He ______ ______ _____________happy.） It seems that he is late for school转为同义句He ------- to -------- late for school. It seems that your English is very It seems that this one is hot It seems that he has known that He seems to ____ ____ that IT seems that he is very tired.是主语从句还是表语从句 It seems that he is quite pleased with the result.中 “seem为何要加S IT seems that he is good at swimming?(同义句)_ __ __ ___good at swimming. it seems that he is a teacher(改同义句）____seems____ ______a teacher 看起来他是个好孩子 除It seems that he is a good boy 这句 seems ,results,that,is,it,angry,at,he,the,怎么造句 it seems that he is right,isn't right?为什么要用right?