1. 以 -ic 结尾的动词加 -ed 和 -ing
以 -ic 结尾的动词，先将词尾变成 -ick, 再加 -ed/-ing， 例如：
panic --- panicked , panicking 惊慌
mimic --- mimicked , mimicking 模仿
picnic --- picnicked , picnicking 野餐
traffic --- trafficked , trafficking 交通
2. guy 的用法，
guy 这个词在美国人口语中经常出现，复数形式 guys 可以指男性，或男女都有，甚至可以都是女性, 但单数的 guy 只指男性。
Hi, guys. How are you doing?
3. enquire = inquire 打听, 询问
enquire 英国写法, inquire 美国写法
这个词多用作不及物动词，例：
You can inquire of your neighbours where the bank is.
I called the station to enquire about train times.
We must enquire into the matter.
We'd like to enquire whether he really came.
上面这句 whether 从句并不是 enquire 的宾语从句, enquire 后省略了 as to, 不省略的话应该是 We'd like to enquire as to whether he really came.
