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一、强调形式
强调形式总共分成五大类：
1. 对动词进行强调(do\does\did + V)
Sitting in front of the screen does damage the eye and physical posture of children.
Some people do believe that the overuse of chemicals (e.g. Fertilizers and pesticides) do pose a threat to the well-being of local people.
2. 双重否定可表强调
We cannot deny that receiving the distance education is never without drawbacks.
It is not unrealistic for the government to reduce the amount of waste.
3. 比较状语可表强调
Nothing is more important than to develop the children’s ability of learning on their own.
Students would have greater capability to deal with their academic life than those who do not have the gap year spent in working or travelling.
Nothing is more imperative than to learn from the past.
4. what引导的主从可表强调
What is related to the economic collapse is the failure of the government’s policies.
What really matters is cooperation.
5. 强调句型可表强调
It is/was + 被强调的成分 + that/who, 所强调的可以是单词、短语，也可以是从句，但必须保证其结构完整。被强调的成分可以是主语、表语、宾语、同位语、状语等，但不能是定语或谓语。
It is the government that should shoulder the responsibility to protect the endangered species.(对主语强调)
It is teachers who are competent to instruct their students to be a good social member.(对主语强调)
It is through job training that the young unemployed would have the opportunity to get jobs again.(对状语强调)
It is the large company which the public think polluting the water supply.(对宾语进行强调)
注：强调句中的时态要根据原句的时态而定。即原句为过去某种时态，则强调句中的be就用过去时;原句为现在的某种时态，强调句中就用be的现在时态。有时还可以用It might be/must have been/can’t be…that等句式。
例句：
It is because people are stuck in the traffic that they spend longer time in travelling.
It might be the lack of guidance of parents that leads to the going astray of young people.
强调句的判断：强调句型可以通过“还原法”来进行判断，若删除强调句型结构后，句子能还原为一个完整的句子，就是强调句。强调句可以看作是用固定的表达-It is/was…that (which, who, whom, where, when)…, 将句子的某个成分(除了谓语)进行重点强调。但是，去掉这个固定的句型部分，句子本身并无任何变化。
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