称心常识网appear常用作不及物动词或连系动词，表示“出现，呈现，显得，似乎”，后可接不定式、形容词或从句。
（1）appear vi. 出现，显露；似乎
反义词：disappear 消失
After the storm, a rainbow appeared in the sky.
My sister is an actress. She appeared in several films so far.
（2）appear还可用作系动词，意思是“似乎，显得”
① appear + to do 似乎……
Everybody appears to be well prepared.
He appeared not to have heard what we had said.
② appear + adj./v.-ed
She appeared quite weak.
You appeared all right when I left.
③ appear + that -clause（用it作形式主语）
It appears to me that you are all mistaken.
It happens that she will win.
