如何写好段落。
好段落
题旨来表达。整个段落必须紧扣这个主题(stick or hold to the topic)
就是段落的统一性(unity)。
(completeness or adequateness)。
过渡必须流畅(smooth)
(coherence)。
下面我们就对这三个标准分别加以说明。
1. 统一性
子都是不可取的。
Joe and I decided to take the long trip we'd always wanted across
the country. We were like young kids buying our camper and stocking
it with all the necessities of life. Bella bakes the best rhubarb pie.  We started out in early spring from Minneapolis and headed west
across the northern part of the country. We both enjoyed those people
we met at the trailer park. Joe received a watch at his retirement  dinner. To our surprise, we found that we liked the warm southern
regions very much, and so we decided to stay here in New Mexico.
controlling idea take the long
trip across the country。文中出现两个irrelevant sentences
Bella bakes the best rhubarb pie Joe and I
一个Bella Joe received a watch at his retirement
dinner这一句更是与主题句不相关。考生在四级统考作文卷上常常因为造出irrelevant sentences
My name is Roseanna, and I like to keep physically fit. I used to  weigh two hundred pounds, but I joined the YMCA for an exercise class
and diet program. In one year I lost eighty pounds. I feel much
better and never want to have that much weight on my five-feet frame  again. I bought two new suitcases last week. Everyday I practice
jogging three miles, swimming fifteen laps, lifting twenty-pound
weights and playing tennis for one hour. My mother was a premature baby.
本段的controlling idea 是like to deep physically fit两个irrelevant sentences I bought two new suitcases last week
一个是My mother was a premature baby。
native speakers同样会造出来irrelevant  sentences
2完整性
题句而没有推展句来进一步
Physical work can be a useful form of therapy for a mind in turmoil.  Work concentrates your thoughts on a concrete task. Besides, it is  more useful to work ---- you produce something rather than more  anxiety or depression.
本段的主题句是段首句。本段的两个推展句均不能回答主题句中提出的问题。什么是  a mind in turmoil Physical work又如何能改变
therapy
由于四级统考的作文部分只要求写一篇100120
只有大约40
It is not always true that a good picture is worth a thousand words.  Often writing is much clearer than a picture. It is sometimes
difficult to figure out what a picture means, but a careful writer
can almost always explain it.
段首句所表达的主
It is not always true that a picture is worth a thousand words.  Sometimes, pictures are pretty useless things. If you can't swim and  fall in the river and start gulping water, will you be better off to  hold up a picture of yourself drowning, or start screaming "Help"?
3(coherence)
指的是使
1意连
介绍几种常见的排列方式。
A(chronological arrangement)
We had a number of close calls that day. When we rose, it was
obviously late and we had to hurry so as not to miss breakfast; we
knew the dining room staff was strict about closing at nine o'clock.
Then, when we had been driving in the desert for nearly two hours ---
-- it must have been close to noon ---- the heat nearly hid us in;
the radiator boiled over and we had to use most of our drinking water
to cool it down. By the time we reached the mountain, it was four
o'clock and we were exhausted. Here, judgement ran out of us and we
started the tough climb to the summit, not realizing that darkness
came suddenly in the desert. Sure enough, by six we were struggling
and Andrew very nearly went down a steep cliff, dragging Mohammed and
me along with him. By nine, when the wind howled across the flat
ledge of the summit, we knew as we shivered together for warmth that
it had not been our lucky day.
本段从rose(not to miss breakfast,
closing at nine o'clock)close to noon
结束(By nine--")。
B. 按位置远近排列(spatial arrangement)。
From a distance, it looked like a skinny tube, but as we got closer,
we could see it flesh out before our eyes. It was tubular, all right,
but fatter than we could see from far away. Furthermore, we were also
astonished to notice that the building was really in two parts: a
pagoda sitting on top of a tubular one-story structure. Standing ten
feet away, we could marvel at how much of the pagoda was made up of
glass windows. Almost everything under the wonderful Chinese roof was
made of glass, unlike the tube that it was sitting on, which only had
four. Inside, the tube was gloomy, because of the lack of light. Then
a steep, narrow staircase took us up inside the pagoda and the light
changed dramatically. All those windows let in a flood of sunshine and we could see out for miles across the flat land.
(from a distance)get
closer(ten feet away)inside the pagoda
及里等等。