check off . check up；put a mark beside something to show that it has been counted 清点；核对；验讫

The teacher checked off each pupil as he got on the bus．老师一上车，就清点学生人数。

Please check off these lists again．请把这些清单再核对一下。

She checked off the names she wanted to invite。她在要邀请的人员名字上做了记号。

Please check off these parcels before they are dispatched．在发送这些包裹前请打上查讫记号。

check off .go off duty 下班

We check off at six p．m．daily．我们每天下午六点下班。

check off .deduct union dues from a worker's paycheck 从工资中扣除（工会费）

My dues were checked off every month．我的工会费每月从工资中扣除。

check on . inspect；verify 核实；检查

We'd better check on this story before we print it ．在印刷之前我们最好把这个情况核实一下。

We'll check on the plane before it leaves．飞机起飞前我们要进行检查。

check out . pay the bill and leave 结帐离开

Guests must check out before noon，or they will be charged for the day．客人必须在中午前结帐离开，否则将付全日费用。

We headed directly for the airport after we have checked out of the hotel．我们付了旅馆费以后，就直接去飞机场了。

check out . confirm by carefully checking检验无误；核实

Would you check out these names and numbers，please？请检验一下姓名和号码好吗？

The accountant checked out the bills and found them OK．会计查对了帐单，发现正确无误。

Please check out each room to see if it is fit for a guest．请检查每个房间看看是否适合客人住。

check out . leave；resign；assist departure of 离开；离职；辞职；帮助…离开

When he checked out，I was appointed his successor．他离职后，我被指定去接替他。

They were checked out two hours ago．两小时前，有人帮助他们离开了。

The airline has checked their luggage out．航空公司已给他们办了行李托运。

check out .give or lend and make a record of it 发给或借出并登记

I checked out this book from the library in the morning．我今天早上在图书馆借了这本书。

The boss checked out the tools to the workmen as they came to work．工人们来上班时，老板把工具发给他们并作了登记。

check out .die 死

I'm afraid he's just checked out．恐怕他刚刚去世。

check over . inspect carefully 仔细检查

He checked over the names on the list to ensure that everything was correct．他仔细检查了名单上的姓名，以便确认一切准确无误。

Please check over the plane before it leaves．起飞前请检查飞机。

Check your test paper over again．再仔细检查一下你的考卷。

check up .examine；make inquires about；investigate检查；核对；调查

Please check up your papers carefully before you hand them in．交卷以前请仔细检查一下。

I'll ask the doctor to check me up．我要请医生给我做一下检查。

Please check up the facts before you write the report．在写报告之前请把事实核对一下。

check with . accord with 与…符合；与…核对无误

Does this report check with your investigation？这篇报告与你的调查相符吗？

check with . confer or discuss with与…商议

You'd better check with your father before you make the final decision．在作出决定之前，你最好同你父亲商量一下。

cheer on . encourage；encourage with cheers or shouts 鼓励；用欢呼或叫喊为…鼓劲

The coach is good at cheering the athletes on when they meet with difficulties．这位教练很善于在运动员遇到困难时鼓励他们。

We kept cheering on both teams．我们不断为双方加油。

The crowd cheered the runners on as they started on the last lap of the race．当赛跑运动员进入赛程的最后一圈时，人群为他们喝彩加油。

cheer up .become happier；inspire高兴起来；振作起来

Cheer up！Your troubles will soon be over．振作起来吧！你的困难不久就会过去的。

cheer up .make more cheerful使欢乐；使高兴

He tried to cheer them up with funny stories．他想讲些滑稽的故事使他们开心。

The news of your return to this country has cheered me up no end．你要回国的消息使我振奋不已。

All the people cheered up at the good news that our country has successfully launched a manned satellite．全国人民欢呼我国成功地发射了一枚载人卫星。

chime in   join in singing 跟着唱起来

The singer asked the audience to chime in．这位歌手请大家跟着一起唱。

The whole group chimed in on the chorus．全组的人都参加合唱。

chime in  express agreement；break into a conversation同意；插话

He was so interested in our discussion that he chimed in from time to time．他对我们的讨论非常感兴趣，不时地插话。

I thought you'd chime in．我想你会同意的。

chime in with . harmonize with；agree；go well together与…符合一致；附和

You should have your own viewpoint．Don't always chime in with others' opinion．你应该有你自己的观点，不要附和别人的意见。

I think your plans will chime in with mine．我想你的计划会同我的一致。

When father suggested going to the beach for the vacation，the whole family chimed in with the idea．当父亲提议去海滨度假时，全家欣然同意。