副词easily, badly, smoothly, well等连用。

　　The suit washes easily.

　　这套衣服很容易洗。

　　(2)某些感官动词和系动词(如feel, look, seem, taste, sound等)加形容词可表示被动意义。

　　That dog looks dangerous.

　　那只狗看起来很危险。

　　(3)want, need, require等表示"需要"时，其后要用动名词的主动形式表达被动意义。即want/need/require doing＝want/need/require to be done。

　　The clothes need washing.

　　＝The clothes need to be washed.

　　衣服需要洗了。

　　(4)be worth doing表示"值得做......"时，其后的动名词用主动形式表达被动意义。

　　The book is worth reading.

　　这本书值得读。

　　(5)在句型"主语＋be＋adj.＋to do"中，不定式用主动形式表示被动意义。常见的形容词有：hard, easy, heavy, fit, nice, comfortable, difficult等。

　　The question is hard to answer.

　　这个问题难以回答。

　　(6)be to blame表示"应受到责备"，不定式和句子主语之间用主动形式表达被动意义。

　　The truth is that the passers­by, rather than the driver, are to blame for the terrible accident.

　　事实真相是过路人而不是司机对这起严重的事故负责。

　　集中演练2

　　2－1.单句语法填空

　　①The art exhibition is well worth visiting (visit) a second time.

　　②The pen writes (write) smoothly.

　　③-Do you like the cloth?

　　-Yes，it feels (feel) very soft.

　　④The flowers need watering/to be watered (water)．

　　⑤These fish are not fit to eat (eat).

　　⑥The children are not to blame (not, blame)；it is the parents who are to blame (blame).

　　2－2.单句改错

　　⑦The novelist was glad to know that his novels was sold well.去掉第二个was

　　⑧Her car needs being repaired.being repaired→repairing或to be repaired

　　⑨The film is well worth being seen.being seen→seeing

　　⑩The work is difficult to be done.be done→do

　　⑪The table is felt smooth.is felt→feels

语法点二 by＋动词­ing形式 　　

　　1．by＋动词­ing形式表示"通过......方式"

　　The old man makes a living by selling newspapers.

　　这位老人以卖报纸谋生。

　　He passed the exam by working hard.

　　他通过努力学习，考试合格了。

　　2．by表示"方式"的其他用法

　　(1)by＋交通工具(交通工具前不带冠词)，如by bus/car/bike/plane等。

　　I go to school by bike every day.

　　我每天骑自行车去上学。

　　(2)by the＋具体的时间或度量名词，如by the hour/day/year/kilo/meter/dozen 等。

　　He is paid by the hour.

他按小时得到报酬。