| A knowledge of chord progressions will help you communicate and play with other musicians. |
了解和弦的进行可以帮助你和其他的音乐人一起弹奏交流 |
| It is a must for participating in any kind of jam session. |
在即兴合奏中更是必不可少 |
| Knowing the most commonly used chord progressions and forms allows for greater enjoyment and unity when playing with other musicians. |
了解最常用的和弦进行和形式可以使你更和谐的与其他人一起弹奏 |
| Most songs use three or more chords though some songs exist that only use two chords. |
大多数歌曲有三个或以上的和弦，也有的歌曲只有两个 |
| Often musicians will embellish chords by adding or removing notes and to provide further interest may vary the rhythm. |
许多音乐人会通过增加或者减少音符的方式来润色和弦，为歌曲提供更丰富的节奏变化 |
| One chord "structures" are uncommon but they do exist. |
只用到一个和弦的结构很少见，但也存在 |
| For instance, Frere Jacques is a one-chord song because it can be played against a single major chord. |
比如说Frere Jacques就是一首单和弦结构的歌，它可以只用一个主和弦演奏 |
| The melody "Taps", traditionally used at American military funerals, and which is very evocative, consists only of the notes which comprise the C-major chord (C, E, G). |
美军葬礼上的传统演奏曲目“Taps”， 是一首余音绕梁的旋律，它只用到了C大调主和弦的三个音C,E,G |
| One chord songs are rare on guitar. |
单和弦歌曲在吉他中很少见 |
| The most common chord progression is the I-IV-V. |
最常见的和弦进行是I-IV-V（一级-四级-五级） |
| Note that Roman Numerals are used to describe these chord progressions. |
注意我们用罗马数字来表示和弦进行 |
| Many songs use only these three chords. |
很多歌曲只用到这三个和弦 |
| If one views chords as a set of balancing scales with the root note and octave root at opposing ends it will be noted that the IV and V chords are at equal distance respectively to the root and octave root. |
如果把和弦音看做是两个八度音之间平均分割的话，那么可以发现IV级和弦到根音和V级和弦到八度音之间的距离是相等的 |
| Take for example the key of C major: |
拿C大调来说 |
| C - D - E - F - G - A - B - C |
C - D - E - F - G - A - B - C |
| You will see that the G note (or chord) is a fifth above the root note. |
你会发现G音（或和弦）是根音上方的第五个音 |
| The note F is a fifth below the octave. |
F音是八度根音下方的第五个音 |
| This movement of a fifth is very pleasing to the human ear in its sense of balance and cohesion in relation to the root note. |
五级和弦在听觉上对主和弦构成非常稳定和谐的支撑 |
| Another way to view chord progressions is that of a journey. |
如果把和弦进行看做一段旅途 |
| In the sense that the root (or tonic) chord is the starting point and the octave root is at the end. |
把根音（或主音）看做起点，八度音看做终点 |
| All other points (chords) provide interest and variation with the fourth and the fifth chord occupying a special place on the journey due to them being half-way. |
其他所有的音符（和弦）都在半途中占据着重要的位置，和四级，五级和弦一起构成了有趣的变化 |
| Many chord progressions start at the tonic (I), moves away to somewhere else, only to come back to the tonic. |
很多和弦进行都从主音（主和弦）开始，转移到其他的音上，最终又回到主音 |
| You can play this progression with major chords or you can substitute minor chords for the IV or V. |
你可以用大调和弦来演奏这个进行，活着用其他的小调和弦来替代四级和五级和弦 |
