摘要：so that：以便，为了，引导目的状语从句时，从句中常含有can, could, may, might, should, will, would等情态动词 。
一、目的状语从句的定义
目的状语从句是用来表示某个动作或行为的目的的从句。它通常出现在主句之后，并且通过引导词来连接主句和从句。
二、目的状语从句的引导词
1. so that：以便，为了，引导目的状语从句时，从句中常含有can, could, may, might, should, will, would等情态动词 。
2. in order that：为了，与so that 意思相近，引导目的状语从句时，从句同样常含有情态动词，比so that更正式。
3. lest：以免，唯恐，从句常用“(should)+动词原形”的虚拟语气形式 。
4. for fear that：生怕，唯恐，从句常用虚拟语气形式，口语中也可不用虚拟语气。
5. in case：以防，万一，从句可根据实际情况使用陈述语气或虚拟语气。
三、目的状语从句的用法及例句
1. 由so that引导
- 例句1：I get up early so that I can catch the first bus.（我早起以便能赶上第一班公交车。）
- 例句2：She studies hard so that she may get good grades.（她努力学习以便能取得好成绩。）
- 例句3：He reads a lot of books so that he can expand his knowledge.（他读很多书以便能扩充自己的知识。）
- 例句4：They practice speaking English every day so that they could communicate with foreigners fluently.（他们每天练习说英语以便能流利地和外国人交流。）
- 例句5：The teacher explains the problem again and again so that all the students can understand it.（老师一遍又一遍地解释这个问题，以便所有学生都能理解。）
- 例句6：I turned up the radio so that I could hear the news clearly.（我调高收音机音量，以便能清楚地听到新闻。）
- 例句7：She goes to bed early so that she will be energetic in the morning.（她早睡以便早上能精力充沛。）
- 例句8：We save money every month so that we can buy a new house in the future.（我们每月存钱以便将来能买新房。）
- 例句9：He took a taxi so that he wouldn't be late for the meeting.（他打出租车以便开会不迟到。）
- 例句10：They started early so that they could arrive at the destination on time.（他们早早出发以便能准时到达目的地。）
- 例句11：She whispered so that no one else could hear what she was saying.（她小声说以便其他人听不到她在说什么。）
- 例句12：I repeat the words so that I can remember them better.（我重复这些单词以便能更好地记住它们。）
- 例句13：He exercises regularly so that he can keep fit.（他经常锻炼以便能保持健康。）
- 例句14：We clean the house thoroughly so that we can welcome our guests comfortably.（我们彻底打扫房子以便能舒适地迎接客人。）
- 例句15：She wears glasses so that she can see the blackboard clearly.（她戴眼镜以便能清楚地看到黑板。）
- 例句16：He works hard so that he can support his family.（他努力工作以便能养家糊口。）
- 例句17：They plant more trees so that they can improve the environment.（他们种更多的树以便能改善环境。）
- 例句18：I bring a map so that I won't get lost.（我带了地图以便不会迷路。）
- 例句19：She practices the piano every day so that she can play beautifully.（她每天练习钢琴以便能弹得优美。）
- 例句20：We write down the key points so that we can review them later.（我们写下要点以便之后能复习。）
2. 由in order that引导
- 例句1：He gets up at 5:00 am in order that he can catch the early train.（他早上5点起床，为了能赶上早班火车。）
- 例句2：She works day and night in order that she can finish the project on time.（她日夜工作为了能按时完成项目。）
- 例句3：They study abroad in order that they can experience different cultures.（他们出国留学为了能体验不同的文化。）
- 例句4：I take notes carefully in order that I can remember what the teacher says.（我认真做笔记为了能记住老师说的话。）
- 例句5：He saves money every month in order that he can buy a car next year.（他每月存钱为了明年能买辆车。）
- 例句6：She practices speaking English with foreigners in order that she can improve her oral English.（她和外国人练习说英语为了能提高英语口语。）
- 例句7：We do sports regularly in order that we can keep healthy.（我们经常做运动为了能保持健康。）
- 例句8：They listen to English podcasts every day in order that they can improve their listening skills.（他们每天听英语播客为了能提高听力技能。）
- 例句9：He takes extra courses in order that he can get a better job in the future.（他选修额外的课程为了将来能找到更好的工作。）
- 例句10：She reads English novels every week in order that she can expand her vocabulary.（她每周读英语小说为了能扩大词汇量。）
- 例句11：We get up early in order that we can have enough time to prepare breakfast.（我们早起为了能有足够的时间准备早餐。）
- 例句12：He practices driving every weekend in order that he can pass the driving test.（他每个周末练习开车为了能通过驾照考试。）
- 例句13：They plan their trip carefully in order that they can enjoy the journey.（他们仔细规划旅行，为了能享受旅程。）
- 例句14：I learn computer skills in order that I can be more competitive in the job market.（我学习计算机技能为了能在就业市场更有竞争力。）
- 例句15：She joins various clubs in order that she can make more friends.（她参加各种俱乐部为了能交更多朋友。）
- 例句16：He works overtime in order that he can earn more money.（他加班为了能挣更多钱。）
- 例句17：We clean the classroom thoroughly in order that we can create a good learning environment.（我们彻底打扫教室为了能创造一个好的学习环境。）
- 例句18：She takes part in volunteer activities in order that she can help those in need.（她参加志愿活动为了能帮助那些有需要的人。）
- 例句19：He studies hard in order that he can enter a famous university.（他努力学习为了能进入一所著名大学。）
- 例句20：They buy a new camera in order that they can record their wonderful moments.（他们买了新相机为了能记录他们美好的时刻。）
3. 由lest引导
- 例句1：He took an umbrella lest it (should) rain.（他带了把伞，以防下雨。）
- 例句2：She locked the door lest someone (should) break in.（她锁上门，以免有人闯入。）
- 例句3：The students review their lessons carefully lest they (should) fail the exam.（学生们认真复习功课，以免考试不及格。）
- 例句4：He checked his homework again and again lest he (should) make mistakes.（他一遍又一遍检查作业，以免出错。）
- 例句5：We reminded him of the meeting time lest he (should) forget it.（我们提醒他会议时间，以免他忘记。）
- 例句6：She turned down the music lest she (should) disturb the neighbors.（她调低音乐音量，以免打扰邻居。）
- 例句7：The old man walks slowly lest he (should) fall down.（老人走得很慢，以免摔倒。）
- 例句8：He wrote down the address lest he (should) forget it.（他写下地址，以免忘记。）
- 例句9：We keep the medicine out of children's reach lest they (should) take it by mistake.（我们把药放在孩子够不到的地方，以免他们误食。）
- 例句10：She closed the window lest the rain (should) come in.（她关上窗户，以免雨进来。）
- 例句11：The driver drove carefully lest he (should) have an accident.（司机小心驾驶，以免发生事故。）
- 例句12：He covered his mouth lest he (should) cough loudly.（他捂住嘴，以免大声咳嗽。）
- 例句13：We hid the present lest the kids (should) find it before their birthday.（我们把礼物藏起来，以免孩子们在生日前发现它。）
- 例句14：She put on a thick coat lest she (should) catch a cold.（她穿上厚外套，以免感冒。）
- 例句15：The teacher repeated the instructions lest the students (should) misunderstand.（老师重复了指示，以免学生误解。）
- 例句16：He lowered his voice lest he (should) be heard by others.（他压低声音，以免被其他人听到。）
- 例句17：We saved some money lest we (should) need it in an emergency.（我们存了一些钱，以防有紧急情况需要。）
- 例句18：She set an alarm lest she (should) oversleep.（她设了闹钟，以免睡过头。）
- 例句19：The athlete stretched carefully lest he (should) get injured.（运动员认真做拉伸，以免受伤。）
- 例句20：He avoided making noise lest he (should) wake the baby up.（他避免发出噪音，以免吵醒婴儿。）
4. 由for fear that引导
- 例句1：She didn't go out at night for fear that she might be in danger.（她晚上不出去，生怕有危险。）
- 例句2：He was worried for fear that the child might hurt himself.（他很担心，生怕孩子会伤到自己。）
- 例句3：They walked quietly for fear that they might wake up the sleeping dog.（他们安静地走路，生怕吵醒睡着的狗。）
- 例句4：She covered the baby with a blanket for fear that he might catch a cold.（她给宝宝盖了毯子，生怕他感冒。）
- 例句5：He didn't tell his parents the truth for fear that they would be angry with him.（他没有告诉父母真相，生怕他们会生他的气。）
- 例句6：The girl didn't speak in public for fear that she would make mistakes.（这个女孩不在公众场合发言，生怕犯错。）
- 例句7：We didn't move the injured man for fear that we might make his injury worse.（我们没有移动受伤的人，生怕会使他的伤势恶化。）
- 例句8：She always carries an umbrella with her for fear that it might rain.（她总是随身带着伞，以防下雨。）
- 例句9：He checked his wallet again for fear that he might have lost his money.（他又检查了一遍钱包，生怕丢了钱。）
- 例句10：They didn't turn on the TV for fear that they would disturb the neighbors.（他们没有打开电视，生怕打扰邻居。）
- 例句11：She didn't eat too much for fear that she would gain weight.（她没有吃太多，生怕长胖。）
- 例句12：He didn't drive too fast for fear that he might have an accident.（他没有开得太快，生怕发生事故。）
- 例句13：We didn't make any noise for fear that we would wake up the baby.（我们没有发出任何声音，生怕吵醒宝宝。）
- 例句14：She didn't go swimming alone for fear that something bad might happen.（她没有独自去游泳，生怕会发生不好的事情。）
- 例句15：He didn't tell the secret to anyone for fear that it would be spread.（他没有把秘密告诉任何人，生怕秘密被传开。）
- 例句16：They didn't leave the door unlocked for fear that someone might break in.（他们没有不锁门，生怕有人会闯入。）
- 例句17：She didn't play with the knife for fear that she might cut herself.（她没有玩刀，生怕割伤自己。）
- 例句18：He didn't climb the tree for fear that he might fall down.（他没有爬树，生怕摔下来。）
- 例句19：We didn't forget to bring the tickets for fear that we couldn't enter the theater.（我们没有忘记带票，生怕进不了剧院。）
- 例句20：She didn't stay out late for fear that her parents would worry about her.（她没有在外面待到很晚，生怕父母会担心她。）
5. 由in case引导
- 例句1：Take your coat in case it gets cold.（带上你的外套，以防天气变冷。）
- 例句2：I'll bring an umbrella in case it rains.（我会带把伞，以防下雨。）
- 例句3：He always keeps some money in his pocket in case he needs it.（他总是在口袋里放些钱，以防需要。）
- 例句4：We should save some water in case there is a drought.（我们应该存些水，以防干旱。）
- 例句5：She writes down the phone number in case she forgets it.（她写下电话号码，以防忘记。）
- 例句6：Bring a map in case you get lost.（带张地图，以防迷路。）
- 例句7：I'll leave a message for you in case you come back late.（我会给你留个便条，以防你回来晚。）
- 例句8：They keep a first - aid kit at home in case of an emergency.（他们在家备有急救箱，以防紧急情况。）
- 例句9：He studies hard in case he fails the exam.（他努力学习，以防考试不及格。）
- 例句10：She checks her email every day in case there are important messages.（她每天查看电子邮件，以防有重要信息。）
- 例句11：We lock the windows in case someone tries to break in.（我们锁上窗户，以防有人试图闯入。）
- 例句12：He takes some snacks with him in case he gets hungry.（他带了些零食，以防饿了。）
- 例句13：I'll tell him the news in case he doesn't know it.（我会告诉他这个消息，以防他不知道。）
- 例句14：She always has a backup plan in case the first one doesn't work.（她总是有备用计划，以防第一个计划行不通。）
- 例句15：Bring a charger in case your phone runs out of battery.（带上充电器，以防你的手机没电。）
- 例句16：We book the hotel in advance in case there are no rooms available.（我们提前预订酒店，以防没有房间。）
- 例句17：He records the meeting in case he misses some important points.（他记录会议内容，以防错过一些要点。）
- 例句18：She brings extra pens in case one of them stops working.（她带了额外的笔，以防其中一支不能用。）
- 例句19：We set off early in case there is a traffic jam.（我们早早出发，以防交通堵塞。）
- 例句20：I'll take some medicine in case I get sick.（我会带些药，以防生病。）
来源：蒙古元素