字母Ａ在單詞里有四種讀音，為了方便記憶，我們把這四種讀音分別叫：重開(kāi)音、重閉音、非重音和協(xié)同音。

一、重開(kāi)音

重開(kāi)音顧名思義就是在重讀開(kāi)音節(jié)中的讀音。開(kāi)音節(jié)是語(yǔ)音中的一個(gè)重要概念，英語(yǔ)音節(jié)一般由節(jié)首、核心和韻尾三個(gè)部分組成。節(jié)首在前，核心居中，韻尾在后，英語(yǔ)音節(jié)構(gòu)成的一般模式為：節(jié)首+核心+韻尾。音節(jié)根據(jù)韻尾的有無(wú)可以分出開(kāi)音節(jié)與閉音節(jié)，沒(méi)有韻尾的音節(jié)為開(kāi)音節(jié)。一個(gè)音節(jié)如果沒(méi)有韻尾，也就是說(shuō)這個(gè)音節(jié)的末尾是其核心，核心是由元音來(lái)?yè)?dān)任的，元音在發(fā)音時(shí)氣流不受阻礙，發(fā)音比較開(kāi)闊，故稱之為開(kāi)音節(jié)。開(kāi)音節(jié)還包括相對(duì)開(kāi)音節(jié)，相對(duì)開(kāi)音節(jié)有韻尾，但這個(gè)韻尾必須由一個(gè)輔音加上一個(gè)不發(fā)音的元音字母E一起構(gòu)成。相對(duì)開(kāi)音節(jié)是一種特殊的開(kāi)音節(jié)。

字母Ａ在重讀開(kāi)音節(jié)里有兩種讀音，一是讀讀字母音[ei ]，例如：lake [leik] take [teik] save [seiv] station ['stei??n] baker ['beik?] place [pleis] tomato[t?'meit?u] safe [seif] gate [geit] snake [sneik] cage [keid?] baby ['beibi] paper ['peip?] famous ['feim?s] later ['leit?] radio ['reidi?u] patient ['pei??nt]。二是讀長(zhǎng)音[a:]，例如： banana [b?'nɑ:n?] father ['fɑ:e?] rather ['rɑ:e?]

二、重閉音

重閉音顧名思義就是在重讀閉音節(jié)中的讀音。有韻尾的音節(jié)為閉音節(jié)。韻尾由輔音來(lái)承擔(dān)，輔音在發(fā)音時(shí)氣流受到一定阻礙，發(fā)音比較閉塞，故有韻尾的音節(jié)為閉音節(jié)。字母A在重讀閉音節(jié)里讀[?]，例如：[bl?k] catch [k?t?] hamburger ['h?mb?:g?] math [m?θ] rabbit ['r?bit] bank [b??k] accident ['?ksid?nt] happen ['h?p?n] marry ['m?ri] exam [ig'z?m] cabbage ['k?bid?] passenger ['p?sind??] fact [f?kt] parrot ['p?r?t]

三、非重音

非重音顧名思義就是在非重讀音節(jié)中的讀音。字母Ａ在非重讀音節(jié)里有兩種讀音，一是讀[ ? ]，例如：husband ['h?zb?nd] Japan [d??'p?n] America [?'merik?] machine [m?'?i:n] again [?'gen] company ['k?mp?ni] agree [?'gri:] panda ['p?nd?] around [?'raund] library ['laibr?ri]。二是讀[ i ]，例如：language ['l??gwid?] manager ['m?nid??] village ['vilid?]temperature ['temprit??] message ['mesid?]cabbage ['k?bid?] chocolate ['t??k?lit]encourage [in'k?rid?]

四、協(xié)同音

協(xié)同音是指字母在單詞中的讀音受到前面或后字母影響的讀音。例如：字母A在W后讀[?]或[?:] ：washroom ['w??rum] watch [w?t?] water ['w?:t?] wash [w??] was [w?z] Washington ['w??i?t?n]；字母A在S/ n前讀[a:]：class [klɑ:s] ask [ɑ:sk] past [pɑ:st] basket ['bɑ:skit] glass [glɑ:s] pass [pɑ:s] France [frɑ:ns] dance [dɑ:ns] fast [fɑ:st] last [lɑ:st] grass [grɑ:s] headmaster ['hed'mɑ:st?]。