被动语态是有关动词的语法范畴，它用于被动结构的句子中，表示主语是动作的承受者 1）被动语态的构成形式：助动词be+及物动词的过去分词（助动词的be要随主语的人称和数作相应的变化，并且有不同的时态形式。 English is taught in this elementary school. All the tickets were sold out. The decision will be announced 2)如果句子的谓语是个动词词组或者动词短语，在变成被动语态的时候，整个动词短语或者动词词组要被当做一个单个的及物动词来处理 the film has been much talked the plan was given up what he said should not be laughed at3)一个句子如果有主动语态变为被动语态，原来的句子中的主语也就是动作的执行者，在被动语态的机子重要用介词“by”引出 jack is putting up a picture on the wall / a picture is being put up on the wall by jack4)一般来说，在被动语态句中由“介词by+动作的执行者”的介词短语通常可以省略，尤其是在动作执行者难以或者不需要明确指出的时候。因为在被动语态句中主要强调的是动作的承受者，而动作的执行者已经被降到了次要的地位。但是如果动作的执行者在主动语态的句子中仍然是受强调的成分，那么变为被动语态的时候，这个动作的执行者仍然要保留。 Shakespeare wrote Hamlet / Hamlet was wrote by Shakespeare被动语态中的情态动词：this word can also be used as a verbthis must be done at oncethe question is going to be discussed soo被动语态的否定式与疑问式：the poem wasn't written in 1931this sentence can't be analyzed this waywhen was the place built?has anything been done about it?
