一、合乎語法規(guī)范
如主謂結(jié)構(gòu)完整，主謂一致，正確的時態(tài)、語態(tài)以及其它語法規(guī)則。
There are many students play football on the sports ground.
---There are many students playing football on the sports ground.
1. 一致性
意思的完整性
Bicycles are so popular in China.
-----Bicycles are so popular in Chinathat almost every family has at least one.
2. 連貫性
句子各部分意義上的連貫
句子各部分結(jié)構(gòu)上的連貫
邏輯連詞（另外具體講）
Eg. He was knocked down, but it was notserious.
------He was knocked down, but was not seriously hurt.
Tom is charming, clever, and a very capable young man.
--------Tom is a charming, clever, and verycapable young man.
Tosucceed in a scientific research, persistence is needed.
------To succeed in a scientific research, oneneeds to be persistent.
3. 句式的多樣性
“需求的增長導致了價格的升高”
The cause/reason for higher prices was anincrease in demand,
The/One effect/consequence/result of anincrease in demand is higher prices.
The demand has increased. Therefore/So/As aresult/Accordingly/Consequently/Because of this/Thus/Hence/For this reason/Now,the prices are higher.
Because/As/Since/Now that the demand hasincreased, the prices are higher.
An increase in demand often causes/resultsin/leads to/produces higher prices.
Higher prices are caused/by/due to anincrease in demand.
The prices are higher because of/as aresult of / on account of /owing to/ through an increase in demand.
