在初中英语语法中， used to 相关短语是单选、完形、语法填空高频考点。三个外形十分接近的结构 used to do 、 be used to doing 、 be used to do ，很多同学做题总是混淆，写作也频频丢分。今天我们把这三组句型彻底拆解，分清词义、结构、否定疑问，避开考试陷阱。一、used to do sth. 过去常常做某事含义：描述过去的习惯、过去存在的状态，但是现在已经不再这样，暗含今昔对比。 to 是不定式符号，后面必须接动词原形。✅ I used to get up late. 我过去常常很晚起床。（现在起得早）✅ She used to be shy. 她以前很内向。（现在不内向了）否定与疑问（中考必考点）否定两种写法：1. 口语常用：didn’t use to +动词原形He didn’t use to play basketball. 他以前不打篮球。2. 书面正式：used not to +动词原形He used not to play basketball.疑问句：Did +主语 + use to do …?✅ Did you use to swim in summer? 你过去夏天常游泳吗？易错提醒：不要写成 used to doing ，这里to后面一定要动词原形。二、be used to doing sth. 习惯于做某事含义：习惯于某种行为、状态。这里 to 是介词，不是不定式，后面接名词、代词或者动名词doing，这是学生出错最多的地方。be动词随时态人称变化：am / is / are / was / were used to doing。✅ I am used to walking after dinner. 我习惯饭后散步。✅ He was used to the hard life. 他习惯了艰苦的生活。否定：be not used to doing✅ She is not used to staying up late. 她不习惯熬夜。三、be used to do sth. 被用来做某事这是被动语态结构，表示物品的用途，“某物被用来做……”，to是不定式，后接动词原形 。✅ Knives are used to cut things. 刀是用来切东西的。✅ Wood is used to make desks. 木头被用来制作桌子。三组句型对比记忆口诀used to do 过去常常，to后原形不能忘be used to doing 习惯于，to后动名词跟上be used to do 表用途，被动结构记心上 四、中考高频易错陷阱1. 区分to的属性：to是介词就加doing；不定式符号就加动词原形。很多同学看到 used 就下意识写doing，忽略三个短语的含义差别。❌ I used to getting up early.✅ I used to get up early. 我过去经常早起。2. used to 只能描述过去，不能用于现在和将来。想要表达“现在常常”，不能用used to，要用often。3. 语境提示词：看到 but now （但是现在），大概率考 used to do ，进行过去和现在对比。例：He used to live in town, but now he lives in the village.他以前住在城里，但现在住在乡下。4. be used to doing 可以用于多种时态，过去、现在都可以。When I moved north, I was used to eating noodles.当我搬到北方，我就习惯吃面条了。五、拓展小句型 had better (not) do sth.配套补充中考高频小句型： had better (not) do sth. ，意为“最好（不要）做某事”，用来提建议、警告，后面接动词原形，没有to，缩写 ’d better。✅ You’d better go home now. 你最好现在回家。✅ You’d better not watch too much TV. 你最好不要看太多电视。⚠️ 错句：You’d better to go home。（to必须删掉）巩固练习题一、单项选择1. My father ______ ride a bike to work, but now he drives his car.A. used to B. is used to C. was used to2. Tom ______ getting up early every morning.A. used to B. is used to C. was used to3. Stamps ______ send letters by people.A. used to B. are used to C. are used to do4. You’d better ______ late for class.A. not be B. not to be C. don’t be5. —Did you use to ______ music?—Yes, but now I am used to ______ sports.A. like; doing B. like; do C. liking; doing二、改错，划出错误并改正1. She used to living in a small village.2. Pens are used to writing.3. You’d better to finish your homework first.4. He didn’t used to drink tea.5. I am used to live in the city.三、用括号内单词适当形式填空1. He used to ______ (play) the piano.2. She is used to ______ (drink) warm water every day.3. Bamboo can ______ (use) to build houses.4. You’d better not ______ (stay) out too late.参考答案一、1.A 2.B 3.C 4.A 5.A二、1.living改为live；2.writing改为write；3.去掉to；4.used改为use；5.live改为living三、1.play 2.drinking 3.be used 4.stay
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