可数名词的数规则变化与不规则变化知识网络
规则变化
1. 在单数形式后加s school—schools computer—computers
2. 以s, x, ch, sh,结尾的名词加es bus—buses watch—watches
brush—brushes stomach—stomaches
3. 以辅音字母加y结尾的名词将y变成i再加es baby——babies country——countries
4. 以元音字母加y结尾的名词直接加s key——keys play——plays
5. 以f或fe结尾的名词将f或fe变为v再加es,有的则只加s 一般：knife——knives half——halves;
wolf——wolves leaf——leaves
特殊：roof——roofs chief——chiefs
6. 以辅音字母加o结尾的名词，加es hero——heroes potato——potatoes；
Negro——Negroes tomato——tomatoes
7. 以元音字母加o结尾的词，以及某些以o结尾的外来词变为复数时只加s zoo——zoos radio——radiospiano——pianos photo——photos
kilo——kilos video——videos
8. 以th结尾的名词加s month——months mouth——mouths
不规则变化
1. 变元音字母 man——men foot——feet
tooth——teeth mouse——mice
2. 变词尾 child——children ox——oxen
3. 单复数同形 fish deer sheep means
4. 只有复数形式 clothes glasses trousers goods
5. 复合名词的复数形式 ①有主体词的复合名词将主体词变为复数。如：passerby——passersby行人
lookeron——lookerson旁观者
②没有主体名词的复合名词，在词尾加s。如：grownup——grownups成年人
③由man和woman构成的复合词，两部分都要变为复数。
如：man teacher——men teachers男教师
6. 有些名词形式上虽然是单数，意义上却是复数 people人们 cattle牛，家畜 police警察
7. 有些名词及学科名词形式上是复数，意义上却是单数 news新闻 politics政治 physics物理
8. 以is结尾的外来词变is为es emphasis——emphases强调，重点
basis——bases基础
In spite of so many years of education behind us, can we confidently say we understand what it feels like to be a teacher?
The biggest misunderstanding about teaching jobs is that anyone can be a teacher. In fact, the truth is far from it. 1 They also know the teaching theory well. They should know how things should be taught and how one can be inspired to learn. Also, they need to have an idea about classroom management and students’ psychology（心理学）.
Now it can be really annoying for a teacher if someone says teaching is one of the easiest jobs around, because everyone just needs to be taught for a few hours a day. 2 However, teachers work longer to come up with ways to make the knowledge appear more interesting to students and help them learn better.
3 And this is a big reason why more people decide to choose teaching as a career. However, good teachers choose to make good use of the break, by enrolling(注册) themselves for workshops on teaching, classroom management, and related things.
All teachers are not the same, as against what is widely believed. 4 Every teacher is different and has a different approach（方法） to teaching.
5 A teacher has meetings to attend, and is responsible for(对……负责) organizing school events. An important duty of a teacher is to prepare the progress report of each student and discuss it with his or her parents.
In a word, teachers ought to be respected for what they do, and we should never forget their great contribution（贡献） to our success in life.
A. A teacher has many things to do rather than just teach.
B. It is true that teachers get a lot more holidays than others.
C. A good teacher is one who motivates students to overcome challenges.
D. To begin with, teachers are people who perform well in their fields of study.
E. A statement that is true for one teacher is not necessarily true for the others.
F. And common people even believe teachers are probably overpaid when their days end at 3 pm.
G. These teachers give all they can to create an ideal learning environment for their students.
