called 为什么要加ed?
问题描述：
called 为什么要加ed?
．天气没有出现好转的迹象,所以*号召我们做好防洪的准备.
The weather showed no signs of getting better so the government called upon us to get prepared for floods.
答
这句话中动词都加上了ed,这就表示是过去发生的事,所以call也不例外,过去试