pitch upon . pitch on . select by chance；single out选出；挑出
Whenever there's an unpleasant job to be done . the chief pitches on me．每当有讨厌的工作要干，头头就选中我。
I pitched upon the very house that suited me．我选中了使我最满意的房子。
Why did he pitch on the poor little boy as the one who broke the cup? 他为什么偏偏要说是这个可怜的小男孩打破杯子呢?
pitch in . start work eagerly 努力投入工作
If everyone pitched in we'll soon have the job finished．如果每个人都拼命干，我们很快就能把活干完。
pitch in . give help or money for something ；contribute帮助某事；捐献
He wouldn't have finished the painting if his wife hadn't pitched in．如果没有他妻子尽力协助，这幅画他就完不成了。
We all pitched in five yuan to buy her a present．我们每人都捐五块钱买了一份礼物送给她。
pitch into . work hard at投身于
She pitched into the work and had the house cleaned up by noon．她拼命地干，到中午前后便把房子打扫干净了。
pitch into . attack with blows or words大骂；攻击
The boys had to be separated once they had pitched into each other．男孩子们一旦打架就得把他们分开。
He pitched into the idea of raising taxes．他对增加税收的建议大肆攻击。
pitch into . begin to eat heartily开始大吃
After walking on the hills all day，they could hardly wait to pitch into their dinner．在山上走了一整天后，他们等不及地大吃了起来。
The children pitched into the meal as though they hadn't eaten any thing for days．孩子们开始大吃起来，好象几天没有吃东西似的。
place in the sun . A good condition 顺境；显要的地位
He's found himself a place in the sun now and doesn't want to start off on any new ventures．他现在已经有了一定地位，不再想冒什么风险了。
plain sailing . easy 不费事；一帆风顺
Life is by no means plain sailing．生活决不是一帆风顺的事。
Revolution is never plain sailing，it,is,full of twists and turns．革命从来都不是一帆风顺的，而是充满了艰难曲折。
plan on . intend打算
We plan on visiting your city next month．我们打算下个月访问你们的城市。
I plan on going to the movies after I finish my homework．我打算做完作业后就去看电影。
plan on . count on指望；确定；预期
I'm hoping to go away for the weekend，but I'm not planning on it ．我想外出度周末，但没定下来。
Don't plan on my going with you，for I expect to be busy this weekend．不要以为我会陪你一块去，因为本周末我会很忙的。
play upon . play on . perform on a musical instrument演奏（乐器）
He was playing an old tune on his flute．他正用笛子吹奏一首老曲子。
It was my part at this feast to play upon my instrument and I have done all I could. 在宴会中，我负责奏乐，我也尽力了。
play upon . play on . cause an effect on；influence影响
The TV film played on his feelings．这部电视剧震撼了他的感情。
The cries of the baby at night played on my nerves．夜间婴儿的哭声闹得我烦躁不安。
play upon . play on . utilize利用
He played on her good nature to borrow some money from her．他利用她的善良向她借了些钱。
The speaker knew how to play on the audience's feelings．这位演说者懂得怎样利用听众的情绪。
He could play upon his pastor as he chose. 他可以随心所欲地利用牧师。
play…for . treat somebody as把…看作
He played the man for a fool．他把那人当作傻瓜。
play around . play about . amuse oneself in a lighthearted way轻松愉快地玩
The children are playing around in the garden．孩子们在园子里玩耍。
play around . play about . toy；meddle玩弄；瞎弄
The school told him that if he didn't stop playing about，he would fail in his exams．校方告诉他，要是他还瞎混的话，他考试会失败的。
She is playing around with a man twenty years younger than she is．她跟一个比她年轻二十岁的男人鬼混。
play along . keep somebody waiting for an answer or a decision使（某人）焦急地等候
You've played him along for some time now， without telling him what you really want．你们没告诉他你们需要什么，使他焦虑地等待了许久。
play along . cooperate合作
We felt that the best way to get what we wanted was to play along with them．我们觉得要达到我们的愿望，最好的办法是同他们合作。
He plays along with his boss all the time，but I'm sure he does not really agree with him．他跟他老板一直合作着，但我敢肯定他并不真正与他老板意见一致。
play at . play（ball，card，）打（球、牌等）
They are playing at hockey．他们正在打曲棍球。
play at . play the game of make believe of .作假装…的游戏
Let's play at being pirates．让我们来假装海盗。
We watched the kindergartners playing at camping out this afternoon．今天下午我们看了幼儿园的孩子们做野营游戏。
play at . do something in a halfhearted way 不认真做
You must settle down and concentrate．You're only playing at doing your homework．你做作业一点也不认真，你要定下神来专心做你的作业。
This is a job that needs to be tackled wholeheartedly—not played at ．这件工作需要全神贯注认真对待，不能敷衍了事。
play back . replay放录音
We recorded our English lesson and then played it back．我们把英语课内容录了下来，然后就放录音听。
I'm going to play back the first half of Act One．我打算重放第一幕上半部的录音。