threat什么时候加s
threat是名词威胁,可以可数,所以复数的时候加s,例如:
1、We take threats of this kind very seriously.我们对这类威胁非常重视。
2、These threats are not to be taken lightly.这些威胁可不能等闲视之。
3、They make threats but back down at the first sniff of trouble.他们起先气势汹汹,但一看情形不妙立刻软了下来。