let go . release；stop holding 释放；放手

The boy grabbed Jack's coat and would not let go．小男孩抓住杰克的衣服不放。

The balloon flew up into the air as soon as the child let if go．那孩子一松手，气球就升上了天。

Let him go．放他走。

let go . neglect；pay no attention to 忽视；不注意

Robert let his teeth go when he was young and now he has to go to the dentist often．罗勃特年轻时对自己的牙齿不注意，现在他不得不常去看牙科医生。

After she was married，Jane let herself go and was not pretty any more．简结婚以后忽视了打扮自己，就不再漂亮了。

let go . weaken and break under pressure 破裂

The old water pipe suddenly let go and water poured out of it ． 旧水管突然破裂，水流了出来。

let go . allow something to pass；do nothing about 听其自然；放任；不予计较

The children teased Frank，but he smiled and let it go．孩子们逗弗兰克，他笑笑就算了。

When John was late，the teacher scolded him and let it go at that．当约翰迟到时，老师训斥了他一顿以后就算了。

let go . discharge from a job；fire 撤职；革职

Mr．Wilson got into a quarrel with his boss and was let go．威尔逊先生与他的老板吵了一架，被解雇了。

let go . make something go out quickly；shoot；fire 发射；射出

The soldiers let go a number of shots．战士们连发了数枪。

Paul was so angry that he let go a blow at the boy．保罗生气挥拳揍那男孩。

The truck driver saw the flat tire and let go a loud curse．卡车司机看见轮胎漏气瘪了，大骂起来。

let go . be free in one's actions or talk；relax 行动或说话无拘束；轻松

Mr．Brown let go at the reunion of his old class and had a good time．布朗先生与老同学重聚时玩得轻松愉快。

The workers worked hard all week，but on Saturday night they went to town and let themselves go．工人们辛苦工作了一周，但在周六晚上则进城去放松放松。

let in . （of water）enter by leakage （水）漏入

These rubber shoes are letting in water．They need repairing．这双胶鞋漏水，得补一下了。

let in . admit；allow to enter or penetrate容许进入

You'd better open the window and let in the light and fresh air．你最好打开窗户让光线和新鲜空气进入室内。

let in for . bring something upon somebody ；cause somebody to incur（a debt，an obligation，a task，）使某人招致某事；使某人卷入（债务、责任、任务等）

I'm not feeling very pleased with those children；through their carelessness I've been let in for something like thirty dollars．跟那些孩子们在一起感到不太愉快；由于他们不小心，使我花费了大约三十美元。

He's letting himself in for a lot of trouble．他给自己惹来许多麻烦。

He was let in for a good hundred pounds by his son's bankruptcy．他儿子的破产使他也受到了足足一百镑的损失。

 let in on . share a secret with；allow somebody to know about something ； permit to participate in 透露秘密；让某人介入某事；准许加入

We mustn't let him in on our plans．我们不应让他了解我们的计划。

Do let me in on your secret！一定得让我知道你们的秘密。

We re fused to let him in on any information concerning the research project．我们拒绝告诉他有关那个研究项目的任何消息。

let into . allow to enter 让…进入

Who let you into the building?  谁让你进入大楼的?

let into . put into the surface of 嵌入；插入

She let a piece of lace into her dress．她在衣服上镶了一条花边。

let into . allow to share （a secret） 告之；使知

We have let her into the secret．我们已经把秘密告诉了她。

let into . assail either physically by blows or with words 责骂某人；拳打某人

I was so infuriated by what he said that without a word I let into him．他说的话使我大怒，以致于我一句话没说就揍了他一顿。

Mr．Brown rose to his feet and let into the last speaker．布朗先生站起来，责骂前一个发言的人。

let loose . allow to go free； set free；loosen； release from restraint 放开；释放；松开；放出

The farmer opened the gate and let the bull loose in the pasture．农夫打开门，把牛放到草地上。

Jim caught Ruth' s arm and would not let loose．吉姆抓住露丝的手臂不放。

let loose . give freedom to somebody to do something ；allow somebody to speak or act freely 随心所欲；自由言论；不加限制

Mother let Jim loose on the apple pie．母亲任吉姆吃苹果饼。

Who let this teacher loose on that class?  谁让这个老师随心所欲地管那个班的?

The teacher told Henry that some day she was going to let loose and tell him what she thought of him．老师告诉亨利总有一天她要痛快地说出她对他的看法。