Unit 2: Conjunctions

博客介绍了英语中连词的相关知识,连词用于连接句子中的其他单词并表明其关系,有并列连词、关联连词、副词性连词和从属连词四种类型,还列举了各类连词的常见形式及示例,掌握这些有助于写作时提升思维和句子质量。

CONJUNCTIONS

Conjunctions are words that link other words in a sentence and indicate the relationship between those words. There are four types of conjunctions:

  1. coordinating conjunctions
  2. correlative conjunctions
  3. adverbial conjunctions
  4. subordinating conjunctions

You will study conjunctions again in Week 4 when you study the different types of clauses. But for now, learn the four types of conjunctions as subcategories of one of the eight parts of speech.


Coordinating conjunctions join words or word groups of equal importance.

There are only seven coordinating conjunctions: 
*Use the memory word FANBOYS to help you remember all seven coordinating conjunctions.

  1. For
  2. And
  3. Nor
  4. But
  5. Or
  6. Yet
  7. So

Examples

  • The child was crying, for he had fallen and scraped both knees.
  • The man and the woman walked hand in hand down the street.
  • The Tan’s did not wish to visit Alaska, nor did they wish to visit Tierra del Fuego.
  • She likes tea but not coffee.
  • The student could play or study, but not both.
  • The young man ate breakfast, yet he was still hungry.
  • The game ended, so the team left the field.

Correlative conjunctions are word pairs that join words or words groups of equal importance.

Common correlative conjunctions include:

  • not only . . . but also
  • whether . . . or
  • both . . . and
  • not . . . but
  • either . . . or
  • as . . . as
  • neither . . . nor

Examples

  • They want to travel not only to Europe but also to Asia.
  • I want either the red dress or the black shoes.
  • I want both the red dress and the black shoes.
  • Whether you clean your room or vacuum the house is up to you.

Unlike coordinating conjunctions and correlative conjunctions that link words and word groups, adverbial conjunctions join independent clauses, which you will study in Unit 4.

Adverbial conjunctions tell the reader the relationship between the two main clauses. Below are common adverbial conjunctions organized by the relationship they specify.


Addition Emphasis Comparison 
or Contrast
Cause or 
Effect
Time
in addition 
furthermore 
moreover 
further
in fact 
indeed
however 
nevertheless 
nonetheless 
otherwise 
in contrast 
in comparison
as a result 
consequently 
hence 
therefore 
thus
finally 
meanwhile 
next

Subordinating conjunctions are a word or group of words that introduces a subordinate clause, which you will study in Unit 4.

Below are common subordinating conjunctions organized by the relationship they specify.


Cause or 
Effect
Concession Condition Comparison 
or Contrast
Purpose Space or Time
as 
because 
since
though 
although 
even though 
even if
if 
since 
unless 
when 
whenever
while 
as 
rather than
in order that 
so that
before 
since 
once 
after 
while 
when 
until

Study these charts, for you will be referring to them throughout the course. You should become familiar with these words and the corresponding organizational relationship. They will help you to improve your thought and sentences as you write.


内容概要:本文设计了一种基于PLC的全自动洗衣机控制系统内容概要:本文设计了一种,采用三菱FX基于PLC的全自动洗衣机控制系统,采用3U-32MT型PLC作为三菱FX3U核心控制器,替代传统继-32MT电器控制方式,提升了型PLC作为系统的稳定性与自动化核心控制器,替代水平。系统具备传统继电器控制方式高/低水,实现洗衣机工作位选择、柔和过程的自动化控制/标准洗衣模式切换。系统具备高、暂停加衣、低水位选择、手动脱水及和柔和、标准两种蜂鸣提示等功能洗衣模式,支持,通过GX Works2软件编写梯形图程序,实现进洗衣过程中暂停添加水、洗涤、排水衣物,并增加了手动脱水功能和、脱水等工序蜂鸣器提示的自动循环控制功能,提升了使用的,并引入MCGS组便捷性与灵活性态软件实现人机交互界面监控。控制系统通过GX。硬件设计包括 Works2软件进行主电路、PLC接梯形图编程线与关键元,完成了启动、进水器件选型,软件、正反转洗涤部分完成I/O分配、排水、脱、逻辑流程规划水等工序的逻辑及各功能模块梯设计,并实现了大形图编程。循环与小循环的嵌; 适合人群:自动化套控制流程。此外、电气工程及相关,还利用MCGS组态软件构建专业本科学生,具备PL了人机交互C基础知识和梯界面,实现对洗衣机形图编程能力的运行状态的监控与操作。整体设计涵盖了初级工程技术人员。硬件选型、; 使用场景及目标:I/O分配、电路接线、程序逻辑设计及组①掌握PLC在态监控等多个方面家电自动化控制中的应用方法;②学习,体现了PLC在工业自动化控制中的高效全自动洗衣机控制系统的性与可靠性。;软硬件设计流程 适合人群:电气;③实践工程、自动化及相关MCGS组态软件与PLC的专业的本科生、初级通信与联调工程技术人员以及从事;④完成PLC控制系统开发毕业设计或工业的学习者;具备控制类项目开发参考一定PLC基础知识。; 阅读和梯形图建议:建议结合三菱编程能力的人员GX Works2仿真更为适宜。; 使用场景及目标:①应用于环境与MCGS组态平台进行程序高校毕业设计或调试与运行验证课程项目,帮助学生掌握PLC控制系统的设计,重点关注I/O分配逻辑、梯形图与实现方法;②为工业自动化领域互锁机制及循环控制结构的设计中类似家电控制系统的开发提供参考方案;③思路,深入理解PL通过实际案例理解C在实际工程项目PLC在电机中的应用全过程。控制、时间循环、互锁保护、手动干预等方面的应用逻辑。; 阅读建议:建议结合三菱GX Works2编程软件和MCGS组态软件同步实践,重点理解梯形图程序中各环节的时序逻辑与互锁机制,关注I/O分配与硬件接线的对应关系,并尝试在仿真环境中调试程序以加深对全自动洗衣机控制流程的理解。
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值