begin是否有被动?一般不是都说the class begins,the movie begins吗?为什么这句The research is so designed that once begun nothing can be done to change it.却用了被动?

begin是否有被动?一般不是都说the class begins,the movie begins吗?为什么这句The research is so designed that once begun nothing can be done to change it.却用了被动? the meeting will begin的一般疑问句 begin有被动形式吗?The dinner _______(begin) with a turkey and some pork.答案给的是began.请问was begun能不能用呢?我知道主动肯定可以.但是不是有一个例句是:The research is so designed that once begun nothing can be do 英语翻译是否有被动态 begin不是不能用于完成时吗?为什么有The meeting has begun. begin 用不用被动begin 用不用被动,如果用的话,为什么还有：when we got there,the film had begun already. John was made to wash the car for a week as a punishment它的主语不是人吗为什么用被动语态都说被动语态不用人做主语吗。本人水平不高请见谅 fall into love对嘛?不是一般都说fall in love吗?今天听歌词里有fall into love The frist class begin at eight O'The frist class begin at eight O'clOck(变一般疑问句) The instrument is being repaired by a friend of my father's这句话是被动,是正在进行时的被动一般被动：is repaired正在进行时的被动：is being repaired那么是否只要是正在进行时被动语态都遵循：be+“being”+ 在线等······ She said they would begin the program the next week.的被动语态怎么改?把She said they would begin the program the next week.改成被动语态怎么改? 把Classes begin at half past eight改成疑问句 （特殊疑问句,不是一般疑问句） The books ____next week.A are sold B were sold C will be sold D can sell我选C,一般sell不是主动标被动么, he invented the car in 1885变一般疑问句：将上句变被动：提问A：将上句变被动：提问B：将上句变被动： The search proved difficult,为什么不是The search was proved difficult?the search 不是应该“被”证明很有难度吗?应该用被动语态才对? The publisher sends copies to reviewers to read.该成被动语态时不定式to read 是否需要也变成被动式?为什么?还有是“改成”不是“该成” 例句：the young should look after the old（同义句）the old should ()()()()by the young .我就想问问take care of是否有被动语态 请问有谁知道begin at the beginning的意思吗?