在英语国际音标发音表中，长元音/a:/排在所有符号的第一个，发这个音的要领是嘴巴张大，上下牙齿全部分开，面部肌肉放松，震动声带，很响亮发出，气流通过口腔没有任何阻碍，类似于汉语拼音中的a，但是要发长一点。
一、下面是它发音的几个例子视频，可以感受一下在单词中的发音状况：
48个国际音标举例讲解第一集，长元音/ɑ?/，建议收藏跟读
视频中有以下五个单词，这里分别列出了它们的英式音标和美式音标，供大家参考：
英文原文：car farm card arm garden
英语意思：小车 农场 卡片 手臂 花园
英式音标：[kɑ?] [fɑ?m] [kɑ?d] [ɑ?m] [?gɑ?d(?)n]
美式音标：[kɑr] [fɑrm] [kɑrd] [ɑrm] [?ɡɑrdn]
长元音发音
英语音标拼读训练01，辅音与长元音/ɑ?/拼读，建议收藏练习哦
上面这个视频是辅音和长元音/a:/拼读训练，建议初学者每天写一遍，熟背下来，有助于音标的完全掌握。
清辅音 /pɑ:/ /tɑ:/ / kɑ:/ /fɑ:/ /θɑ:/ /sɑ:/
浊辅音 /bɑ:/ /dɑ:/ /gɑ:/ /vɑ:/ /eɑ:/ /zɑ:/
清辅音 /?ɑ:/ /t?ɑ:/ /ɑ:ts/ /trɑ:/ / hɑ:/
浊辅音 /?ɑ:/ /d?ɑ:/ /ɑ:dz/ /drɑ:/ / rɑ:/
鼻 音 /mɑ:/ /nɑ:/ /ɑ:?/
半元音 / jɑ:/ / wɑ:/ 边音 / ?ɑ:/
三、下面再给大家含有长元音/a:/的50个单词例子：
序号 单词 英式音标 美式音标
1 r [ɑ?] [ɑr]
2 are [ɑ?] [ɑr]
3 ah [ɑ?]com [ɑ]
4 advance [?d?vɑ?ns] [?d?v?ns]
5 advanced [?d?vɑ?nst] [?d?v?nst]
6 advantage [?d?vɑ?nt?d?] [?d?v?nt?d?]
7 after [?ɑ?ft?] [??ft?]
8 afternoon [ɑ?ft??nu?n] [??ft??nun]
9 afterward [?ɑ?ft?w?d] [?ɑft?w?d]
10 aircraft [?e?krɑ?ft] [??r?kr?ft]
11 alarm [??lɑ?m] [??lɑrm]
12 answer [?ɑ?ns?] [??ns?]
13 apart [??pɑ?t] [??pɑrt]
14 apartment [??pɑ?tm(?)nt] [??pɑrtm?nt]
15 arbitrary [?ɑ?b?t(r?)r?] [?ɑrb?tr?ri]
16 arch [ɑ?t?] [ɑrt?]
17 architect [?ɑ?k?tekt] [?ɑrk?t?kt]
18 architecture [?ɑ?k?tekt??] [?ɑrk??t?kt??]
19 argue [?ɑ?gju?] [?ɑrgj?]
20 argument [?ɑ?gj?m(?)nt] [?ɑrɡjum?nt]
21 arm [ɑ?m] [ɑrm]
22 army [?ɑ?m?] [?ɑrmi]
23 art [ɑ?t] [ɑrt]
24 artery [?ɑ?t?r?] [?ɑrt?ri]
25 article [?ɑ?t?k(?)l] [?ɑrt?kl]
26 articulate [ɑ??t?kj?le?t] [ɑr?t?kjulet]
27 artificial [ɑ?t??f??(?)l] [?ɑrt??f??l]
28 artist [?ɑ?t?st] [?ɑrt?st]
29 artistic [ɑ??t?st?k] [ɑr?t?st?k]
30 ask [ɑ?sk] [?sk]
31 aunt [ɑ?nt] [?nt]
32 banana [b??nɑ?n?] [b??n?n?]
33 bar [bɑ?] [bɑr]
34 barbecue [?bɑ?b?kju?] [?bɑrb?kju]
35 barber [?bɑ?b?] [?bɑrb?]
36 bargain [?bɑ?g?n] [?bɑrɡ?n]
37 bark [bɑ?k] [bɑrk]
38 barn [bɑ?n] [bɑrn]
39 basket [?bɑ?sk?t] [?b?sk?t]
40 basketball [?bɑ?sk?tb??l] [?b?sk?tb?l]
41 bathroom [?bɑ?θru?m; -r?m] [?b?θrum]
42 behalf [b??hɑ?f] [b??h?f]
43 bizarre [b??zɑ?] [b??zɑr]
44 blast [blɑ?st] [bl?st]
45 branch [brɑ?n(t)?] [br?nt?]
46 brass [brɑ?s] [br?s]
47 broadcast [?br??dkɑ?st] [?br?dk?st]
48 bypass [?ba?pɑ?s] [?ba?p?s]
49 calm [kɑ?m] [kɑm]
50 car [kɑ?] [kɑr]
四、常见发长元音/a:/的组合单词有：
car 汽车bar 酒吧cartoon 卡通park 公园hard 努力的large 大的
far 远的star 星星mark 标记farm 农场farmer 农民arm 胳膊art 艺术
part 部分market 市场party 聚会army 军队regard 注视garden 花园
dark 暗的smart 聪明
