今天开始每两天学习50个单词。我们先学习合口双元音的拼读规则。
双元音发音总体特点是由第一个单元音滑向第二个单元音，嘴形逐渐合拢，共5个合口双元音，3个集中双元音。请点击观看视频。
下面是更多练习材料。
一、合口双元音 5个合口双元音发音位置参见下图。
1. 合口双元音/ ei / 发音要领：双唇稍扁，牙床从半开到合，由 / e / 向 / i / 滑动。元音字母a在重读开音节中读/ ei /, 有的a, e字母组合读 / ei / 。
1） May Day
May Day is Labour Day,
We are happy and gay.
It reminds us not to be lazy,
Remember: “No pains, no gains.”
2） Rain, Rain Go Away
Rain, rain, go away,
Come again another day.
Rain, rain, go away,
May and Jane want to play.
3) I'm afraid you are late. It's half past eight, and they'll close the gate.
4) Today is pay day and great changes have taken place since the day.
2. 合口双元音/ ai / 发音要领: 双唇中开，由 /a/ 向 / i / 滑动，开口程度由大到小。元音字母 i (y) 在重读开音节中读 / ai /, 有时 i 组合读/ ai /。
1) There Is a Fly
There is a fly,
Wearing a tie,
Holding a pie,
And waving good-bye.
2) Season Sight
Spring is green and light,
Summer is red and bright,
Autumn is golden and high,
Winter is white and quiet.
3) Mike likes to write by the nice bright light at night.
4) Kite tried five times to get the writing prize.
3. 合口双元音/ au / 发音要领: 由 / a / 向 /u/ 滑动，滑动时双唇拢圆，牙床从半开到合。
au读/ au / ： about, around, blouse, cloud, count, doubt, ground, house, loud, mouse；
ow读/ au / : allow, anyhow, brown, cow, down, flower, how, downstairs, however, now;
our读/ au 倒反e /: hour, our, ours, ourselves.
4 .合口双元音/ 反c i / 发音要领: 由 / 反c / 向 /i / 滑动，滑动时双唇拢圆，牙床从半开到合。
oi: coin, join, noise, noisy, point, toilet, voice, boil, disappoint, poison, soil;
oy: enjoy, toy, destroy, voyage, annoy, employ, enjoyable, royal, boycott;
5. 合口双元音/ 倒反e u / 发音要领: 由 / 倒反e / 向 / u / 滑动，滑动时双唇拢圆，牙床从半开到合。元音字母 o 在重读开音节中读 / 倒反e u /, 有时 o 组合读/ 倒反e u /。
1) Snow
Snow, snow, white and cold.
Snow, snow, come and go.
---Oh, snow! Where do you go ?
---I don't know where I go.
2) A Goat
A goat,
Sitting in a boat,
Wearing a coat,
And writing a note.
3) I know you know. I know that you know. I know that you know that I know.
4) I don't know why Joan showed a yellow coat to the old goat.
音形结合记忆单词类似自然拼读法，但比自然拼读法更注重对语音知识的理解，因为理解了的东西可以举一反三，形成正确的再生能力，而不是简单的再现。在词汇量方面，音形结合记忆法涉及许多更高级的多音节词汇。
二、集中双元音的拼读规则，集中双元音的发音示意图如下。
1. 第1个集中双元音（字符输入不便，请参见附图二） ，由第1个单元音滑向第2个双元音，双唇合拢。一些e组合通常发第1个集中双元音。
1) ere: here, atmosphere, severe, mere, merely, sincerely;
2) ear : clear, dear, ear, fear, hear, near, nearby, year, nuclear, beard, tear, hearing;
3) engineer, pioneer, volunteer, cheerful, beer, deer, cheers;。
2. 第2个集中双元音 ，由第1个单元音滑向第2个双元音，双唇合拢。一些a组合通常发第2个集中双元音。
1) air: air, airport, chair, fair, hair, pair, repair, upstairs, affair, armchair, unfair;
2) are: care, careful, careless, compare, prepare, share, square, fare, aware, software;
3) aire: questionnaire, millionaire;
4) ear: bear, pear, wear, unbearable, swear;
5) eir: their, theirs;
6) ere: everywhere, there, where, nowhere, therefore, wherever。
3. 第3个集中双元音 ，由第1个单元音滑向第2个双元音，双唇合拢。一些u组合通常发第2个集中双元音。
1) ure: sure, surely, secure, mature, brochure, cure.
至今为止我们已经讨论了20个元音音素的发音特点，并给了一些例词、韵律小诗和绕口令来帮助练习巩固这些元音音素的发音。辅音音素的发音相对简单，我们将在拼读规则内容中逐一介绍。
最后是第51-100词的音形义性学习资料。点击可播放音频跟读电子发音。
