下面出國(guó)留學(xué)網(wǎng)托福作文欄目小編要和大家分享的是托福作文逗號(hào)的使用大全，可不要小瞧了這個(gè)小小的逗號(hào)，正所謂“細(xì)節(jié)決定成敗”，高分就在這里啦!接下來，和小編一起來了解一下吧~
1. 在并列連詞(and, but, for, nor, or, yet )前使用，用來連接句中的各分句。
The principal reason for this is that none of them possesses chlorophyll, andsince they cannot synthesize their own carbohydrates, they obtain their supplies either from the breakdown of dead organic matter or from other living organisms.
2. 用逗號(hào)來分隔一系列單詞、詞組和從句。
Furthermore the walls of fungal cells are not made of cellulose, as those of plants are, but of another complex sugar like polymer called chitin, the material from which the hard outer skeletons of shrimps, spiders, and insects are made.
They are a major cause of structural damage to building timbers, a cause of disease in animals and humans, and one of the greatest causes of agricultural losses.
3. 逗號(hào)用來分隔與句子其他部分密切相連的簡(jiǎn)短插入語或旁白。(較長(zhǎng)的，更為突兀的或復(fù)雜的插入成分的則用破折號(hào)或圓括號(hào)。)
Chemical fertilization, for example, helps to produce better crops, but is harmful to the environment.
4. 在并列形容詞，即分別修飾同一個(gè)名詞的形容詞之間使用逗號(hào)，但也有的形容詞之間不加逗號(hào)的。
For men, heroism was usually described as bravery and the active, successfulovercoming of adversity.
5. 用逗號(hào)來分隔非限定性修飾語，即該修飾語對(duì)于句子的意義并非必不可少。非限定性修飾語與限定性修飾語的區(qū)別在于，它即使被省略，也不會(huì)改變句子的主要意思。
(1) 同位語
The canopy, the upper level of the trees in the rain forest, holds a plethora of climbing mammals of moderately large size, which may include monkeys, cats, civets, and porcupines.
(2) 從句
The canopy, the upper level of the trees in the rain forest, holds a plethora of climbing mammals of moderately large size, which may include monkeys, cats, civets, and porcupines.
6. 在以"月、日、年"為次序排列的日期間使用逗號(hào)。如果這種次序的日期出現(xiàn)在句子中間，則在"年"后也加上逗號(hào)。
Martin Luther King, Jr., was born on January 15, 1929, and died on April 4, 1968.
但在以"日、月、年"為次序排列的日期間，不使用逗號(hào)。
Martin Luther King, Jr., was born on 15 January 1929, and died on 4 April 1968.
在"月"和"年"之間，或"季節(jié)"和"年"之間，不使用逗號(hào)。
The events of July 1789 are as familiar to the French as those of July 1776 are to Americans.
發(fā)生在1789年7月的那些事件對(duì)于法國(guó)人來說，就像美國(guó)人對(duì)于發(fā)生在1776年7月的那些時(shí)間一樣熟悉。
7. 在表示地名時(shí)
Pandas come from China, Asia.
8. 用以將一導(dǎo)言的或轉(zhuǎn)變語氣的詞或短語(如therefore, however, by the way, for instance)與句中其余部分隔開。
On the other hand, fungi bring about the decomposition of dead organic matter, thus enriching the soil and returning carbon dioxide to the atmosphere.
9. 書寫對(duì)話時(shí)用于某某說等詞語前后。
"Come back soon," she said.
10. 用于短小的引語前。
Disraeli said, "Little things affect little minds."
以上信息為考生詳細(xì)介紹了托福寫作中逗號(hào)的使用，希望考生能有所收獲!考生在平時(shí)的練習(xí)中除了要把注意力放在詞匯句型或是整篇文章的結(jié)構(gòu)布局中，還要學(xué)會(huì)把注意力放在一些影響考生得分的細(xì)節(jié)方面，相信經(jīng)過這樣的備考，考生一定能取得滿意的成績(jī)!
托福作文欄目