signal有信号;红绿灯;等意思，那么你知道signal的过去式是什么吗?今天一起来学习一下signal的过去式以及signal的用法和例句，希望对大家的学习有所帮助!
signal的过去式及其它时态
signal的过去式:signalled
signal的复数:signals
signal过去分词:signalled
signal现在分词:signalling
signal第三人称单数:signals
signal的用法和例句
1、(North Amercian English)All I get is a busy signal when I dial his number (= his phone is being used) .
我什么时候拨他的电话听到的都是忙音。
2、She will be signalling massive changes in energy policy...
她将暗示能源政策会有重大变化。
3、He signalled to the waiter for the bill.
他示意服务员结账。
4、They fired three distress signals...
他们发射了3次求救信号。
5、a stop signal
停车信号
6、He stood up, signalling to the officer that he had finished with his client...
他站起身，向警察示意他和他的当事人已经谈完了。
7、The siren was a signal for everyone to leave the building.
警报器一响，就是要所有人离开大楼。
8、His final round was a signal triumph in a career marked by many sweet moments.
最后一场比赛的胜利在他充满欣喜的职业生涯中具有非凡的意义。
9、The first warning signals came in March...
第一次警示出现在3月份。
10、traffic signals
交通信号灯
