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在通常情況下，不定式到底該用不定式的主動式還是被動式通常由意義來決定（即看意義上是主動還是被動）：　　

■It’s reported that the city needs more land to build houses on.= It’s reported that the city needs more land for people to build houses on.　　

■He is the right man to send the paper to.= He is the right man for us to send the paper to.= He is the right man who we can send the paper to.　　

或：He is the right man to be sent the paper to.= He is the right man who is sent the paper to.　　

■He is not a man to be trifled with.= He is not a man who can be trifled with.