The bird covered the distance in three minutes.时态为?助动词 对covered the distance 划线提问up to now的同义词组是?He has begun his own private'telephone' service.时态为?助动词 否定句 一般疑问句 肯否回答 对his own private'telephone' service划线提问He has begun his own private'telephone' service.时态为？He has begun his own private'telephone' service的助动词He has begun his own private'telephone' service的 否定句He has begun his own private'telephone' service的 一般疑问句 He has begun his own private'telephone
The bird covered the distance in three minutes.时态为?助动词 对covered the distance 划线提问
up to now的同义词组是?He has begun his own private'telephone' service.时态为?助动词 否定句 一般疑问句 肯否回答 对his own private'telephone' service划线提问
He has begun his own private'telephone' service.时态为？He has begun his own private'telephone' service的助动词He has begun his own private'telephone' service的 否定句He has begun his own private'telephone' service的 一般疑问句 He has begun his own private'telephone' service的肯否回答 对his own private'telephone' service划线提问
时态为一般过去时。What did the bird do in three minutes? 时态为现在完成时。助动词是has.
He hasn't bugun his own private telephone service. Has he begun his own private telephone service? Yes,he has.What has he begun?
一般过去式
what did the bird do in three minutes?
up to now: till now , so far等等
现在完成时态
助动词has
否定句在has后加not
一般疑问句将has和he颠倒
肯定回答：yes，he has
what has he begun？
up to now 的同义词组为：so far ,till now ,untill now(这三个词组都是现在完成时的标志词,即他们出现时,句子常用现在完成时)He has begun his own private'telephone' service.时态为现在完成时 ,助动词为has,否定...