主动语态变被动语态的方法及练习
主动语态如何变被动语态
(1)不知道或没有必要说明动作的执行者是谁，不用by+动作执行者短语。
Football is played widely all over the world。
全世界都广泛地踢足球。
(2)强调动作的承受者。
The bank was robbed yesterday afternoon。
昨天下午这家银行遭到抢劫。
(3)作客观说明时，常采用一种被动语态句型。
It is reported that about twenty children have died of flu in the USA。
据报道美国大约二十名儿童死于流感。
3、主动语态的句子变为被动语态的步骤
(1)把原句中的宾语变为主语
(2)动词改为被动形式，即be+过去分词
(3)原来的主语，如果需要的话，放在by后面;如果没必要，可省略。
下面我们来看看被动语态的应试考点：
考点一：make/let sb. do sth see/hear sb. do sth等由省略了to 的不定式做宾语补足语的情况，在编被动语态食物必将to还原e,g , 1.He made the boy work for two hours yesterday----The boy was made to work by him for two hours yesterday.2 .Mother never lets mewatch TV .---------I am never let to watch TV by mother.
考点二：give/lend sb sth等含有双宾语的动词在变化时，要注意两个宾语都可以变化，当“作新主语时，按照步骤变化；当“物”作新主语时，则需要在“人前加上”to或fore,g Jack gave Peter a Christmas present just now.(1)A Christmas present was given to Peterby Jack just now.(2)Peter was given a Christmas present by Jack just now.
考点三：情态动词的被动语态（九年级Unit3）,由于情态动词后边要求动词原型，因而，be永远为be,所以其结构为"情态动词＋be＋过去分词"构成（原来带to的情态动词变成被动语态后"to"仍要保留。）e,g We can repair this watch in two days.------This watch can be repaired in two days.They should do it at once.-------It should be done at once.
考点四：由第一步得知无宾语的动词则不可以变为被动语态，像“主语+系动词+表语”和“主语+不及物动词+介词+宾语”便无法变为被动语态，中考考察典型动词take place ,happen,change等e,g He _______(feel) better
----He feels better
下面句子均有一处错误，请找出并改正过来。 （10分）
①I have a lot of homework to be done tonight． ____________
②Is your history teacher listened carefully in class？ ____________
③Lei Feng"s name remembered by all Chinese people． ____________
④The music is sounded beautiful. ___________⑤By who was this new educational CD-ROM designed ? _____________