The writer had lost his money.He felt upset.He must have bee

The writer had lost his money.He felt upset.He must have been worried.
请问:为什么要用have been,好象不是被动语态啊

liner1115 1年前已收到4个回答举报

summerzyn 幼苗

共回答了18个问题采纳率：88.9% 举报

基于前面的had lost过去完成时,后面的时态延后一个时态,即现在完成时

1年前

etfyw5 幼苗

共回答了23个问题举报

be worried about sth,是worry的一种用法，不是表示被动。

1年前

ttmax 幼苗

共回答了19个问题举报

这里不是被动语态。是对过去的肯定虚拟语气和处于焦急的状态。
sb be worried
must have been.他那时肯定很着急

1年前

rocket0325 幼苗

共回答了19个问题举报

这是对过去发生事情的推测的说法，sb. must have done sth..例如：he looks so happy,he must have passed the exam.这里be是构成be worried，理解为一种焦急的状态。

1年前

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