Couldn't we call a special meeting？我们不能召开一次特别会议吗？9.MODAL You use could in questions when you are making a polite request or asking for permission to do something. Speakers sometimes use couldn't instead of "could" to show that they realize that their request may be refused. 可以礼貌例：Could I stay tonight？今晚我可以待在这吗？He asked if he could have a cup of coffee.他问是否可以喝一杯咖啡 。Couldn't I watch you do it？我不可以看着你做这件事吗？10.MODAL You use could to say emphatically that someone ought to do the thing mentioned, especially when you are annoyed because they have not done it. You use why couldn't in questions to express your surprise or annoyance that someone has not done something. 本可以 （对某人未做某事表示恼怒）强调例：We've come to see you, so you could at least stand and greet us properly.我们来是为了看你，因此你至少可以站起来适当地欢迎我们 。
Why couldn't she have said something？为什么她不能说点什么呢？11.MODAL You use could when you are expressing strong feelings about something by saying that you feel as if you want to do the thing mentioned, although you do not do it. 表示嘴上说要做实际上没有做强调例：I could kill you! I swear I could！我要杀了你！我发誓我要 。"Welcome back" was all they said. I could have kissed them！“欢迎回来，”他们只说了这一句 。
我本想亲吻他们的 。12.MODAL You use could after "if" when talking about something that you do not have the ability or opportunity to do, but which you are imagining in order to consider what the likely consequences might be. 能 （与）（if）（连用，表示假设）例：If I could afford it, I'd have four television sets.要是我买得起，我要有4台电视机 。
13.MODAL You use could not or couldn't with comparatives to emphasize that someone or something has as much as is possible of a particular quality. For example, if you say "I couldn't be happier," you mean that you are extremely happy. 不可能再 （表示已达到极致）强调例：The rest of the players are great and I couldn't be happier.其他运动员都很优秀，我再高兴不过了 。14.MODAL In speech, you use how could in questions to emphasize that you feel strongly about something bad that has happened.。
6.48个音标各写3个单词一、元音：
单元音
1) [i:] sea, he, see, piece, ceiling
2) [i] sit, build, miss, myth
3) [e] bed, desk, head,
4) [ ] bad, land, bank, stamp
5) [a:] car, fast, class, plant, calm, aunt
6) [ ] hot, want
7) [ :] door, more, sport, ball, warm, author, court, bought, caught
8) [u:] good, who, blue, soup,
9) [u] look, put, women, could
10) [ ] cup, come, blood, rough
11) [ :] girl, work, serve, nurse
12) [ ] cadre, ago, forget, polite, dollar, doctor, famous, Saturday
双元音
13) [ei] cake, they, play, eight, great,
14) [ai] bike, die, neither, light, try, find, height, eye
15) [ u ] phone, cold, boat, soul, grow
16) [au] house, town
17) [ i] boy, oil
18) [i ] dear, idea, deer, here, fierce,
19) [ ] pear, care, there, fair
20) [u ] tour, poor,
辅音
1.爆破音
1) [p] pen,
2) [b] bed, comb
3) [t] tell,
4) [d], day, played, wanted
5) [k] cold, sky, quick, school, back, accept, box
6) [g] big, go, guess, language
2.鼻辅音
7) [m] man
8) [n] nine, knife, autumn
9) [ ] bank, uncle, English, sing,
3.舌侧音
10) [l] land, world
4.摩擦音
11) [r] read, write,
12) [f] five, cough, laugh
13) [v] voice, of
14) [ ] think,
15) [ ] this, bathe
16) [s] sit, miss, science, case, scarf
17) [z] zoo, close,
18) [ ] sure, she, social, nation
19) [ ] pleasure,
20) [h] hot, who, hour
5.半元音