雅思作文要写对有这三大标准：统一性、完整性和连贯性，怎么样写才把这个标准都用上呢，例句如下：
一、统一性：
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.
一个段落内的各个句子必须属于一个主题思想，任何游离于中心思想之外的句子都是不可取的。
本段的controlling idea 是like to deep physically fit，但段中有两个irrelevant sentences，一个是I bought two new suitcases last week，另一个是My mother was a premature baby。
二、完整性：
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”?
一个段落的主题思想靠推展句来实现，假如只有主题句而没有推展句来进一步交待和充实，就不能构成一个完整的段落。相同的，虽然有推展句，但主题思想没有得到相对圆满的交待，会给读者一种意犹未尽的感觉。
三、连贯性：
连贯性包括形连和意连两个方面，前者指的是使用转换词语，后者指的是内在的逻辑性。这两者通常是不可分割的。
A.按时间先后排列(chronological arrangement)
B.按位置远近排列(spatial arrangement)
C.按逻辑关系排列(logical arrangement)
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