有一读者问： 下面两句中为何用being?
(1)I'm afraid you are being too particular about your food.
(2)He is being friendly to us.
连系动词be虽是静态动词，但可以用现在进行时态，表示一种临时或暂时的状态。例（1）的意思是：我想你恐怕太挑食了；其含义是：你现在太挑食，并不意味着你总是如此（也可能意味着你平时并不如此）。例（2）的意思是：他现在对我们做出友好姿态（也可能意味着平时并不友好）。再如：
(3)You are not being very polite.
你这可是不大客气呀。
(4)Now you are just being silly.
你这是胡说些什么呀。
(5)You're being difficult again.
你又和人为难了。
(6)Am I being rude to ask such questions?
我提这种问题是不是失礼了？
