She is as innocent as a baby她和婴儿一样纯洁.（这句重在比较.as是“与……一样”的意思.）
She is innocent as/like a baby她纯洁得像一个婴儿.（这句只是一般的描绘,没有比较.as/like是像的意思.）
There seems to be是there be结构,表示“好像有……”.
It seems to be something wrong with it.是错误的说法.
这里把seem to去掉可能有助于你的理
去掉seems to后就是It is something wrong（意思是“它/这是错误的东西”）.跟后面的with it（意思是“在它/这里面”）相冲突.
这句话可以改成：It seems that there is something wrong with it.
C 改错 It seems to be wrong with it.