Definition
To believe that one is much more knowledgeable than others, often in an arrogant or conceited way.
自認為知道很多，自以為是
He always acts like he knows all the answers, which annoys me.
他總是表現得好像知道所有的答案，這讓我很煩。
She thinks she knows all the answers, but she is actually very wrong.
她認為自己知道所有的答案，但實際上她大錯特錯。
He always acts as if he knows all the answers, but sometimes his advice isn't very good.
他總是表現得好像知道所有的答案，但有時候他的建議並不好。