2.feel，look，sound，smell，taste，prove，remain等系动词，用主动形式表达被动意义。

The soup smells good but tastes terrible.

这种汤闻起来不错，但太难喝了。

3.need，want，require等动词以及形容词worth后面，常跟动词-ing形式，用主动形式表达被动意义。

This dictionary is well worth buying.

这本字典非常值得购买。

4.easy，difficult，hard，heavy等形容词后面跟动词不定式，用主动形式表达被动意义。

What life will be like in the future is difficult to predict.

将来的生活如何很难预测。

5.be to blame或be to let也是主动形式表示被动意义。

He is to blame for the broken window.

因为打破了窗户他应该受到责备。

Ⅰ.单句语法填空

1.When fat and salt are removed(remove) from food，the food tastes as if it is missing something.

(2017·全国Ⅰ)

2.Steam engines were used(use) to pull the carriages and it must have been fairly unpleasant for the passengers，with all the smoke and noise.(2017·全国Ⅱ)

3.Sarah has been told/was told(tell) that she could be Britain's new supermodel，earning a million dollars in the next year.(2017·全国Ⅲ)

4.He hurried home，never once looking back to see if he was being followed(follow).(2017·江苏)

5.I was allowed(allow) to get up close to these cute animals at the 600-acre centre.(2016·全国Ⅰ)

6.Truly elegant chopsticks might be made(make) of gold and silver with Chinese characters.

(2016·全国Ⅲ)

7.It is reported that a space station will be built(build) on the moon in years to come.(2015·安徽)

8.Despite the previous rounds of talks，no agreement has been reached(reach) so far by the two sides.(2015·天津)

9.More expressways will be built(build) in Sichuan soon to promote the local economy.(2015·四川)

10.To my delight，I was chosen(choose) from hundreds of applicants to attend the opening ceremony.(2015·福建)