she seems to be sad.动词不定式不是to+动词原形吗,中间为什么加be,不加be行吗,两种意思会不一样吗

It seems that she is very sad=She is seems to be very sad.吗好多人说不能在seem前加is,为什么? She always seems to be Jack seems to be very sad today.的同义句 she seems to be sad.动词不定式不是to+动词原形吗,中间为什么加be,不加be行吗,两种意思会不一样吗 he seems to be sad的同义句怎么说____ ____that he____ sad she seems worried now等不等于she seems to be worried now. She seems to be happy同义句She seems（ ）没空一词 She seems to be angry with you.的同义句 she always seems to be very lucky.同义句 用It seems.改写啊 there seems to be she seems to be very happy 改为同义句 _ _that she _ veshe seems to be very happy 改为同义句_ _that she _ very happy she seems to be worried now.(改为同义句) ______ _____she seems to be worried now.(改为同义句)______ ______ ______ that she ____ worried now. He seems (to be) very sad.他看起来很伤心.有to be 和没有,在语法上有什么区别? my temperature seems to be ( ) ( ) be sad to do sth. 同意句改写She seems to be worried now ___ ___ that she___ worried now She seems to be bored.这句话哪里错了速度! she's presently engaged to be married to a very nice man and seems very happy.是不是she结婚了?