看看你的内衣.Look at your underwear.为什么look后面要加at!

看看你的内衣.Look at your underwear.为什么look后面要加at!

look有很多种用法,后面可以跟不少介词,但是在这里
因为表示朝某样东西看去,要用look at 的形式,比如经常遇到的 look at the blackboard,看黑板等等.
以下是look短语的用法~
1.look about [around]
(1) 环顾四周.如：
The man kept looking about.这个人不停地环顾四周.
(2) 随便看,到处看.如：
A：What can I do for you,madam?夫人,想买什么吗?
B：No,I’m just looking around.不是,只是随便看看.
(3) 到处寻找.如：
I’m looking about for a house.我在找一座房子.
(4) 仔细考虑.如：
Look about carefully before making the decision.先仔细考虑,然后再作决定.
2.look after 照顾,照料,关心.如：
I can look after myself.我能照顾自己.
Who is looking after the luggage?谁在照看行李?
3.look at
(1) 看……,注视…….如：
He looked at me and smiled.他望着我笑了.
Look at him jump [jumping].请看他跳.
(2) 看待.如：
That’s the way I look at it.我就是那样看待它的.
(3) 考虑(多用于含有否定意义的句子).如：
They refused to look at my suggestion.他们拒不考虑我的建议.
(4) 检查.如：
He came to look at the drainage.他是来检查排水设备的.
4.look back
(1) 回顾,回想.如：
I still shudder when I look back on the past.想起过去,我仍然不寒而栗.
(2) 停滞,畏缩,倒退(通常用于否定句).如：
From this time on,he never looked back.从此以后,他便不断进步.
5.look down on [upon] 看不起,瞧不起.如：
You shouldn’t look down upon the poor.你不应该瞧不起穷人.
She likes tennis,but looks down on football.她喜欢网球,但轻视足球.
6.look for
(1) 寻找.如：
I’ve looked for it everywhere.我到处找过它了.
You are looking for trouble.你是在自找麻烦
(2) 期待,指望.如：
We shall be looking for an improvement in your work this term.我们期待你这学期学习进步.
It’s too soon yet to look for results.现在就指望有结果,未免为时过早.
7.look forward to 期待,盼望.如：
We’re looking forward to hearing from you.我们盼望收到你的来信.
The children are looking forward to your visit.孩子们都盼望着你的到来.
注：该结构中的 to 是介词,不是不定式符号,所以其后接动词时要用动名词,而不用动词原形.
8.look in (顺便)来访.如：
Why don’t you look in (on) me next time you’re in town?你下次进城来顺便来串串门好吗?
I may look in at the party on my way home.我回家时可能顺便到聚会处去看看.
9.look into 调查,研究,了解.如：
We’ll look into that right away.我们会马上调查此事.
The police are looking into the cause of the accident.警方正调查事故原因.
10.look like
(1) 看起来象.如：
He looks like your brother.他看上去象你哥哥.
What does he look like?他长相如何?
He looks like an honest man.看来他象个老实人.
(2) 好象要,似乎要.如：
It looks like rain [raining].好象要下雨了.
He looks like winning.好象他要赢了.
11.look on
(1) 旁观.如：
No,I’m not playing; I’m just looking on.不,我不打,我只是看看.
(2) 看(待)(尤指带有某种目光或情绪等).如：
She was looked on with distrust.人家对她总是不信任.
(3) 看作,当作(与 as 连用).如：
He looks on me as his best friend.他把我当作最好的朋友.
We looked on this as useless.我们认为这个东西毫无用处.
12.look out
(1) 向外看.如：
Don’t look out of the window.别往窗外看.
He stood at the window and looked out (at the view).他站在窗前向外望(观看景色).
(2) 注意,当心,小心.如：
Look out.There’s a car coming!当心!汽车来了!
If you don’t look out,you’ll hurt yourself.你若不当心,你会受伤的.
(3) 找出,挑选出.如：
We looked out his address in,the telephone directory.我们在电话簿里查到了他的地址.
13.look over 审阅,翻阅,打量,检查.如：
Would you mind looking over my exercises?请你帮我看一下我的练习好吗?
He looked her over and nodded lightly.他上下打量她,然后微微点了点头.(
14.look through 翻阅,浏览.如：
Before the meeting he looked through the reports.开会前他把报告看了一遍.
Look through your notes before the examination.考试前翻翻你的笔记.
15.look to 注意,负责.如：
The country must look to its defences.这个国家必须加强防务.
Look to it that this doesn’t happen again.注意不要让这事再发生.
16.look up
(1) 查阅,查找.如：
Look up this word in the dictionary.这个词查查词典吧.
(2) 看望,拜访,找(人).如：
I want to look up an old friend.我想去看一位朋友.
(3) 好转.如：
Things are looking up.情况在好转
17.look up to 尊敬.如：
I look up to my parents.我尊敬父母.
He is good teacher.We’ve always look up to him.他是位好老师,我们一向尊重他.