老美告诉你：会“说”英语远远不够

Use last names with people you do not know: Address people using their title (Mr, Ms, Dr) and their last names.
对于不熟悉的人，请使用姓来称呼。称呼人的时候，使用头衔（如先生，女士，博士等）加上他们的姓。

Always use "Ms" when addressing women: It is important to use "Ms" when addressing a woman. Only use "Mrs" when the woman has asked you to do so!
请使用 “Ms” 来称呼女性：用 “Ms” 来称呼女性是比较重要的，只有在她要求你称呼她为 “Mrs” 的时候才这样做。

Many Americans prefer first names: Americans often prefer using first names, even when dealing with people in very different positions. Americans will generally say, "Call me Tom." and then expect you to remain on a first name basis.
美国人偏爱使用名字：美国人喜欢别人使用名字来称呼他们，即使双方的身份不同也这样做。美国人一般会说，“叫我Tom”，并且他希望你就这样称呼，不需要客气。

Americans prefer informal: In general, Americans prefer informal greetings and using first names or nicknames when speaking with colleagues and acquaintances.
美国人更不拘小节：一般来说，美国人更喜欢非正式的问候语，当提到同事和熟人的时候会使用他们的名字或昵称。

Public Behavior
公共场合的行为

Always shake hands: Americans shake hands when greeting each other. This is true for both men and women. Other forms of greeting such as kissing on the cheeks, etc., is generally not appreciated.
握手的必须的：美国人在互相致意的时候都会握手，这是男女通用的，然而其他的问候方式如亲吻脸颊等，则不那么常用。

Look your partner in the eye: Americans look each other in the eyes when they are speaking as a way of showing that they are sincere.
看着对方的眼睛：为表示真诚，美国人在与别人交谈的时候会看着对方的眼睛。

Don't hold hands: Same sex friends do not usually hold hands or put their arms around each other in public in the United States.
别拉手：在美国，同性朋友在公共场合并不太会拉手或者挽住对方的胳膊。

Smoking is Out!!: Smoking, even in public places, is strongly disapproved of by most Americans in the modern United States.
不许抽烟！！在当代美国，抽烟，特别是在公共场合，是非常不被人们接受的行为。