主动句转被动句
1 his mother told him not to waste time on fishing.
2 Father gave me a toy at Christmas.
3 This factory produces machine tools.
4 They should do it at once.
5 He is likely to let you down.
6 They named the child tom.
答案
1 He was told not to waste time on fishing (by his mother).
2 I was given a toy at Christmas (by my father).
3 Machine tools are produced in this factory.
4 It should be done at once (by them).
5 You are likely to be let down.
6 The child was named tom.
以上几个例子都是从语法书摘抄的.代表了几种不同形式的被动变法.1\2是不同的动宾短语中宾语变被动；3是一般句子变被动；4是情态动词变被动；5是不定式变被动；6是主—动—宾—补结构的主动句变被动.