look back on ［to］（及物，不可分）回忆，想起
Michel looked happily back on his life.米歇尔愉快地回忆他的一生。
The old often like to look back on the past.老年人往往喜欢回忆过去。
Mrs Jones could not help shedding tears while looking back on her late son.琼斯夫人想起她已故的儿子，就忍不住流泪。
look down on ［upon］（及物，不可分）轻视
She looks down on us because she enjoys some reputation.因为她有点名气，她瞧不起我们。
He is so proud of his promotion that he looks down on all his former friends.他为自己的晋升而得意忘形，瞧不起所有从前的朋友了。
We mustn't look down on people who haven't had much schooling.我们不应轻视没有受过多少学校教育的人。
I wish you wouldn't look down on this kind of work.我希望你不要轻视这种工作。
look for1（及物，不可分）寻找
The old lady is looking for her eyeglasses.这位老太太正在找她的眼镜。
Walking to and fro here，he seems to be looking for something.她在这里走来走去，好像在找什么东西。
He looked for his wristwatch just now，but couldn't find it.他刚才找他的手表，但是没能找到。
look for2（及物，不可分）期待
I look for important news by the next mail from England.我期待着下一批英国邮件带来的重要消息。
I look for John going home early.我期待约翰赶快回家。
Don't worry！I am looking for your speedy recovery.安心吧！我指望着你早日康复。
Don't look for any help from him.不要指望得到他的什么帮助。
look forward to（及物，不可分）期待
She looked forward to getting a birthday present from her parents.她期待父母送给她一件生日礼物。
I'm looking forward to a letter from him.我盼望他来信。
We look forward to seeing you again soon.我们期望很快再见到你。
Mary's coming is very much looked forward to by them.他们都十分盼望玛丽的到来。
look in on（及物，不可分）对…做短暂访问
I looked in on uncle Wang on my way home yesterday.我昨天回家时顺便去看望了王大爷。
"How about looking in on Lila and Lily this evening？"Maydon suggested.梅登提议：“今晚我们去看望一下莱拉和莉莉怎么样？”
look into（及物，不可分）调查
Don't be eager to settle this matter till it is thoroughly looked into.事情没有查清以前不要急于处理。
The police are looking into the past record of the man.警方正在调查那个人过去的经历。
A committee was formed to look into that case of embezzlement.成立了一个委员会来调查那起贪污案。
look on ［upon］（不及物）旁观
One who looks on sees the game best.旁观者清。
I couldn't stand there looking on with folded arms when I saw him beating up the girl.当眼见他殴打那个女孩时，我不能站在那里袖手旁观。
look on ［upon］...as（及物，必分）把…看做，认为
We look on this as one of the most vital discoveries nowadays.我们认为这是当今最重大的发现之一。
Do you look on him as the best teacher in the school？你认为他是这学校里最好的老师吗？
For a time he was looked on as a promising writer.他一度被看做一位有希望的作家。
look out（不及物）当心，留神（常用于命令句）
Look out！There's a horse galloping towards us.当心！一匹马朝着我们奔驰而来。
Look out！There is danger ahead.小心！前面有危险。
If you don't look out，you'll hurt yourself.要是不当心，你会伤害自己的。
Look out！You could fall off the hillside here！小心！你可能从这山坡上跌下去的！
look out for（及物，不可分）当心，提防
Look out for slippery places on the road！小心路滑！
We must look out for the approach of the enemy.我们必须提防敌人接近。
Look out for petty thieves！谨防小偷！
When you are crossing the street，look out for cars.过街时当心汽车。
look over（及物，可分）检查
She fastidiously looked over every article she wanted to buy.她过于挑剔地检查她想买的每件物品。
Dave was looking over a used car.戴夫正在检查一辆旧汽车。
The auditor looked over the accounts and found some errors.审计员检查了账目，发现一些差错。
The officer looked the rifles of his men over.军官检查了士兵的步枪。
look through1（及物，可分）仔细检查，审查
Look through your examination paper for any small mistakes before you hand it in.交考卷前，要仔细检查一下考卷上的任何小错误。
The editor looked through this novel and wrote down his opinion about it.编辑审阅了这部长篇小说并写下了对它的意见。
Have you looked the man's personal history through？你审查过那个人的履历吗？
look through2（及物，可分）浏览
I generally look through newspapers after supper.我通常在晚饭后浏览报纸。
He often looked magazines through aimlessly.他经常无目的地浏览各种杂志。
look up（及物，可分）（在书中）查找
Branc looked up some information about early American history.布兰克在书中查找一些关于早期美国历史的资料。
She tried to look up his number in the telephone directory.她试图在电话号码簿中查找他的号码。
He took out his dictionary and looked up the word "insulin".他拿出他的词典，从中查找“胰岛素”这个词。
If you don't know the meaning of this word，you may look it up in a dictionary.你如果不知道这个单词的意思，可以在词典中查一下。
look up to（及物，不可分）敬仰
I have looked up to you from my childhood.我从童年时起就一直尊敬你。
We look up to the labour model as our teacher.我们尊这位劳动模范为师。
The doctor，having cured many patients，with no frills，is looked up to by everybody there.这位大夫治好过很多病人，不摆架子，在那里受众人尊敬。
lust after ［for］（及物，不可分）贪图
That man lusts after wealth.那个人老想发财。
Not all businessmen solely lust after profits without consideration for the state interests.工商业家并不都是唯利是图而不考虑国家利益的人。
He said that he lusted after neither fame nor gain.他说，他一不图名，二不图利。