phone calls go unanswered.这句话中的go是什么词性？表示什么意思？

go是什么词性？表示什么意思？为什么要这样用啊？

phone calls go unanswered.这句话中的go是什么词性？表示什么意思？ 英译汉：do phone calls what is important when making phone calls? have you made any last minute phone calls? 英语句形转换： I sometimes make phone calls to clients on the way to school。 I'm glad I always carry enough money for phone calls怎么译? henry,the phone is ringing,Do you want me to go? NO,sit still， Angle calls me 有这首歌吗 谁有go shopping或school life或make a phone的3分钟2人对话啊~~急 GO GO GO GO