2。3。3 句中有非限制性的词或短语之类，以逗号标出以示插入成份：
2. 3. There are unrestricted words or phrases in the three sentences, marked with commas to indicate the insertion components:
1。 Her husband， Bill， is a scientist。 (Bill 为插入成份)
1. Her husband， Bill， is a scientist。 (bill is the insert component)
2。 Kent Howard， my English teacher， is from America。 (插入成份 my English
2. Kent Howard， my English teacher， is from America。 (insert my English
teacher)
Teacher)
3。 Her father， who is a famous scholar， teaches English。(插入成份 who is a
3. Her father， who is a famous scholar， teaches English。 (insert who is a
famous scholar)
4。 Eleanor， his wife of thirty years， suddenly decided to open her own
4. Eleanor， his wife of thirty years， suddenly decided to open her own
2。3。4 句中的城市名如果和它的省、州、国名并列，省、州、国名前后须加逗号：
2. 3. If the name of a city in the four sentences is in parallel with the name of its province, state or country, a comma must be added before and after the name of the province, state or country:
1。 We visited Hartford， Connecticut， last summer。 (Connecticut 为插入成份)
1. We visited Hartford， Connecticut， last summer。 (Connecticut is the insertion component)
2。 Paris， France， is sometimes called "The City of Lights。" (France 为插入
2. Paris， France， is sometimes called "The City of Lights。 &Quote; (France for insert
成份)
Ingredients)
3。 Hartford， Connecticut"s investment in the insurance industry is well
3. Hartford， Connecticut"s investment in the insurance industry is well
known。(Connecticut"s 为所有格式，后面不可加逗号喔)
Known. (Connecticut & quote; s is all formats, and commas are not allowed)
2。3。5 句中带着连接词(but， and， or。。。)的插入成份的前面不可加上逗号：
2. 3. But, and, or... ）The insertion component of cannot be preceded by a comma:
1。 The Red Sox were leading the league at the end of May， but of
1. The Red Sox were leading the league at the end of May， but of
course， they always do well in the spring。 (but 的后面不可加逗号)
course， they always do well in the spring。 (comma is not allowed after but)
2。 The Tigers spent much of the season at the bottom of the league， and
2. The Tigers spent much of the season at the bottom of the league， and
even though they picked up several promising rookies， they expect to be
there again next year。 (and 的后面不可再加逗号)
there again next year。 (comma is not allowed after and)
2。3。6
2. 3. Six
向人说话时，逗号放在对方名字或称谓之后、之前或者前后都加：
When speaking to people, put a comma after, before or before the name or address of the other person:
1。
1.
John， come here。 (John， 逗号在名字之后)
John， come here。 (John, comma after name)
2。
2.
Open the door， John。 ( ，John 逗号放在名字之前)
Open the door， John。 (, John comma before name)
3。
3.
It is， Sir， not my fault。
( ， Sir， 逗号放在称谓前面和后面)
(, sir, comma before and after title)
2。4
2. Four
替代句子里某个成份
Replace a component in a sentence
2。4。1 用逗号替代句子里某部份，表示字词的省略：
2. 4. 1 use comma instead of some part of the sentence to indicate omission of words:
1。 The lion is the symbol of courage; the lamb， of meekness。 (the lamb， of
1. The lion is the symbol of courage; the lamb， of meekness。 (the lamb， of
meekness 原本应该是 the lamb is the symbol of meekness)
Meekness should have been the lamb is the symbol of meekness)
2。 George was the hard worker， John， the lazy one。 (John， the lazy one 原
2. George was the hard worker， John， the lazy one。 (John, the lazy one
本应该是 John was the lazy one)
John was the lazy one)