by在句首句子用什么?

by在句首句子用什么? taken by themselves什么意思 这句话在句首 she went to beijing by train last year这个句子是什么结构的.by train和last year在句中又做什么 year by year 句子用什么时态 The flu is believed to be caused by virus.这句句子的主谓宾是什么?to be在这里做句子的什么成分 动词放在句首为什么要用动名词,如这句请确认句子是否完整正确,.Abandoned what by rights shold be given up.放弃应该放弃的. by在句子的翻译方式都有什么 the production increase by 20 percent,其中by 20 percent在句子中做什么成分 根据句意,用by将两个句子连成一句. 帮忙分析下句子,by为啥能放在句首.整个句子结构解析下.By carved neural pathways I am referring to the process of creating chunks and the navigation system between chunks. Directed by A and starring B.这是一个什么句式?前面是Directed by(被动句),后面却变成starring?这是怎么一回事?还有可以解释一下starring这个词在句子中的意思么? by the end of ,后的句子用什么时态 in case of 和 in case分别放在句子的什么位置 句首、句中还是句末 英语句子中什么词或什么成分可以放在句首? by now的意思?有by now时,句子用什么时态? by Jupiter ,by Jupiter,的这种用法 放在句子中间 用逗号隔开 by himself在句子中做什么成分?The building shall be constructed by himself.上句中的by himself 在句中做什么成分?还有一句话“He has the ability to do the work.变成疑问句是”Has he the ability to do the work? written by在这个句子中起什么作用?做什么成分?