VOA一分鐘英語：辨析近義詞 like 和 as

單詞 “like” 和 “as” 都可以表示 “相似” 的意思，但在使用中它們是有區(qū)別的。想要表示 “外貌相似”，應該用哪個詞？在描述一個人的身份、職業(yè)時，又該用哪個詞？
 
Hi, I'm Tim from BBC Learning English. Here to tell you about two words we use to say that things are similar.
We use like as a preposition before a noun or pronoun and it means 'similar to'. He ran like the wind. Not he ran as the wind.
We use like, and not as to compare appearances. This house looks like a castle.
As can be used as a preposition. It means 'in the role of'. Dan, as your friend, I have to say you're not a good singer.
We often use as to talk about people's jobs. I work as an actor.
Be careful using like and as because the meaning can change. 'As your brother, I'll try to help you.' means I actually am your brother. Change it to like, and it means I'm not your brother but I want to act in a similar way.
 
用法總結
1 “Like” 作介詞時可修飾名詞或代詞，描述人或物 “像，與...相似”。
He ran like the wind.
This house looks like a castle.
 
2 “As” 作介詞時，意思是 “作為，以…身份”。 
Dan, as your friend, I have to say you're not a good singer.
I work as an actor.
注意："like" 和 "as" 互換使用后，可能會改變句子的含義。
As your brother, I'll try to help you.   作為你的哥哥，我會盡力幫你。（我是你的哥哥）
Like your brother, I'll try to help you. 我會像你哥哥那樣盡力幫你。（我不是你的哥哥）