The bird covered the distance in three minutes.時態(tài)為?助動詞 對covered the distance 劃線提問
up to now的同義詞組是?He has begun his own private'telephone' service.時態(tài)為?助動詞 否定句 一般疑問句 肯否回答 對his own private'telephone' service劃線提問
He has begun his own private'telephone' service.時態(tài)為？He has begun his own private'telephone' service的助動詞He has begun his own private'telephone' service的 否定句He has begun his own private'telephone' service的 一般疑問句 He has begun his own private'telephone' service的肯否回答 對his own private'telephone' service劃線提問