Grammar & WritingUnit6When was it When was it invented ?invented ?1. 一般过去时的被动语态结构式: ( 1 )肯定句:主语 + was /were+ 动词的 过去分词 +(by+ 人称代词宾格 )+ 其他 eg : English was studied (by us)three years ago. ( 2 )否定句:主语 + was /were+ not + 动 词的过去分词 +(by+ 人称代词宾格 )+ 其他 eg : English was not studied (by us)three years ago.GrammarGrammar一般过去时态的被动语态一般过去时态的被动语态 ( 3 )疑问句: Be(Was/Were)+ 主语 +动词的过去分词 + ( by+ 人称代词宾格) +其他? eg : Was English not studied (by us)three years ago? ( 4 )特殊疑问句: What/Where/ When +was /were + 主语 + 动词的过去分词 + 其他 ? eg: When was English studied by us?时态肯定形式 否定形式疑问形式一般过去时S +was/were+doneS +was/were+not + doneWas /Were+S + done?Maria bought the book last year. ( 主动句 )The book was bought by Maria last year. When was the book bought by Maria?What was bought by Maria last year?被动句:总结:各种句型的主动语态变为被动语态2. 使用被动语态应注意的几个问题(1) 不及物动词无被动语态。What will happen in 100 years? 100 年后将会发生什么事 ? (2) 有些动词用主动形式表示被动意义。This pen writes well. 这支钢笔好用。This new book sells well. 这本新书很畅销。3. 感官动词或使役动词使用省略 to 的动词不定式 , 主动语态中不带 to, 但变为被动语态时 , 必须加上 to 。My mother makes me do housework every day. =I am made to do housework by my mother every day. 妈妈每天让我干家务。I saw them play basketball yesterday. =They were seen to play basketball by me yesterday. 昨天我看见他们打篮球了。4. 如果是接双宾语的动词改为被动语态时 , 直接宾语 ( 物 )作主语 , 那么动词后要用介词 , 这个介词是由与其搭配的动词决定的。He gave me a book. →A book was given to me by him. 他给了我一本书。He showed me a ticket. →A ticket was shown to me by him....