Question

主动句怎样变被动句

The students often sing the song in English.
Last week she sent me a letter.
I saw Liming sweep the fioor this morning.You must turn off the lights before leaving.He can work out the probiem.怎样变成被动句？

Answer 1

The song is often sung by the students in English.Last week a letter was sent to me by her.Liming was seen to sweep the floor by me this morning.The lights must be turned off by you before leaving.The problem can be worked out by him.（一）主动语态变为被动语态，要把主动语态句中的宾语为为被动语态句中的主语；主动句中的主语在被动句中作介词“by”的宾语，构成由“by”引起的短语（这个短语在不强调施动者时可以省略）；主动句中的主语也可作其他介词（如“in”）的宾语，构成地点状语。 （二）如果主动语态句中有直接宾语和间接宾语，变为被动语态时，有两种变化：把指人的间接宾语作被动句中的主语，并将此宾格人称代词变为主格人称代词，而指物的直接宾语保留不变；或将指物的直接宾语变为被动句中的主语，间接宾语保留不变。如果间接宾语作保留宾语，其前可用介词to。（三）如果主动语态句中的宾语是人称代词宾格，宾格补语是一个名词的话，变为被动语态时，应把宾语改作主动句的主语，而宾语补语保留不变。（四）带有复合宾语的主动句变为被动句时，复合宾语的一部分（宾语）成为主语，剩下的部分（宾语补语）就成为主语补语，它们多为不定式、分词，也可以是名词和形容词。在see，make，feel，watch，hear，notice，help，have等动词后的复合宾语中，如果宾语补语是动词不定式，则不定式to须省略。但在被动句中作主语补语的不定式必须有to。 （五）带介词或副词的短语动词（如look after，put on， pay attention to）用作被动式谓语时，它们原来所带的介词或副词应保留下来。 （六）被动语态中的时态应与主动语态中的时态一致（见上面的例证）。假如主动语态中的时态是进行式，应特别注意；被动语态中的进行式要用be-ing。

Answer 2

The song in English often sung by the students.Last week a letter from her was sent to me.I saw the floor was sweeped by Liming this morning. 或：Liming's sweepping the floor was saw by me this morning.The lights must be turned off before you leaving.The problem could be worked out by him.

Answer 3

The song is often sang by the students in EnglishLast week a letter was sent to me by herI saw the floor was swept by liming this morningThe lights must be turned off before you leave.The problem can be worked out by him.

Answer 4

1.the song is often sang by the students in English.2.a letter was sent to me by her last week.3.Li Ming was seen to sweep the floor by me this morning.4.the light must be turned off before leaving.5.the problem can be worked out by him.