used to
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used toDo not confuse used to do sth with be used to sth .不要混淆used to do sth与be used to sth。
You use used to do sth to talk about something that happened regularly or was the case in the past, but is not now.used to do sth指过去惯常做某事，而现在则不了：
I used to smoke, but I gave up a couple of years ago.
我以前抽烟，但几年前就戒掉了。
You use be used to sth/to doing sth to talk about something that you are familiar with so that it no longer seems new or strange to you.亦可用get used to sth：
We’re used to the noise from the traffic now.
现在我们已经适应车辆往来的噪音了。
I’m used to getting up early.
我习惯早起。
Don’t worry─you’ll soon get used to his sense of humour.
别担心，你不久就会适应他的幽默感。
I didn’t think I could ever get used to living in a big city after living in the country.
我觉得我在农村住了之后就无法适应大城市的生活了。
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People used to think the earth was flat .
人们曾经认为地球是平的。
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I used to live in London .
我曾经在伦敦居住过。
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It 's very different to what I 'm used to .
这与我所习惯的大不相同。
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We 're used to the noise from the traffic now .
现在我们已经适应车辆往来的噪音了。
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All I know is that she used to work in a bank .
我只知道她曾在银行工作过。
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Things ain 't what they used to be .
现在情况不比从前了。
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You used to see a lot of her , didn 't you ?
你过去常见她吧？
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They had got too used to the soft life at home .
他们实在是过惯了家里的安逸生活。
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I read much less now than I used to .
我现在看的书比过去少得多。
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Am I right in thinking that you used to live here ?
我想你过去在这里住过，对吗？
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Standards aren 't what they used to be .
现在的行为标准和过去不一样了。
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You 'll soon get used to the climate here .
你会很快习惯这儿的气候的。
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This drug is used to lower blood pressure .
这种药用于降血压。
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I used to smoke but I gave up two years ago .
我过去抽烟，但两年前就戒了。
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She was not used to mixing with people of high social rank .
她不习惯和社会地位很高的人搅和在一起。
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The test is used to diagnose a variety of diseases .
此项化验可用于诊断多种疾病。
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You soon get used to the little difficulties .
你很快就会习惯这些小小的不便了。
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I 'm used to getting up early .
我习惯早起。
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What became of that student who used to live with you ?
以前和你住在一起的那个学生后来怎么样了？
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I used to play here as a boy .
我小时候常在这里玩。
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People used to believe the earth was flat .
人们一度认为地球是平的。
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Physics used to be very much a male domain .
物理学曾在很大程度上是男人的领域。
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I used to love her but she 's nothing to me any more .
我爱过她，但现在对她再也没什么感情了。
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This formula is used to calculate the area of a circle .
这个公式用于计算圆的面积。
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There are far more opportunities for young people than there used to be .
现在年轻人的机会比过去多得多。
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I used to go to the cinema every week .
我过去每周都去看电影。
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After ten years I 'm used to the strange British ways .
十年之后，我习惯了英国人的奇异习俗。
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It cannot be used to bond wood to metal .
这不能把木料粘贴在金属上。
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Computer software can be used to simulate conditions on the seabed .
计算机软件可用于模拟海底状况。
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It should not be forgotten that people used to get much more exercise .
不应忘记的是，人们过去的锻炼要多得多。
指过去经常做某事或在过去某段时间里做过某事，含现在不再这样之意，强调今昔习惯的对比；此外，used to 除可后接动作性动词（如 work, eat, stay 等），也可后接非动作性动词（如 like, be, have等），以说明过去经常存在的情况或状态。
I used to enjoy gardening, but I don't have time for it now.
我过去喜爱园艺，但现在没时间去弄了。
We used to play hide-and-seek when we were children.
我们儿时常玩捉迷藏游戏。
He used to go to that private school.
他曾在那所私立学校就读。
表示过去经常做某事，只强调过去的重复动作，而不能用于今昔习惯的对比，也不可后接非动作性动词。
His grandparents would take care of him when his parents were busy.
他父母忙的时候，总是祖父母照顾他。
On summer evenings they would have dinner in the garden.
夏天的晚上他们经常在花园里吃晚饭。