英语音标
英语的音标有多套，其中有美式的KK音标、英式的DJ音标。 DJ和KK都是国际音标的一种，DJ音标又有IPA63和IPA88两种标准，三种音标系统不是并列的关系。
KK音标是美式音标，与DJ、IPA最大的的不同点在于儿化音，由于美音有较重的儿化音。KK音标中没有长元音的符号“ː”。
DJ和KK音标不同的地方已经用空色框框标注出来了，DJ和KK的区别都在元音上，辅音是没有区别的。
音标分类：
快速记忆：
发音口腔对照图：
下面这个可以听一下发音：
国际音标
上面图片为 unt 转换成的 150 dpi PNG。原版 PDF 和 SVG 可在官网选择下载：
https://www.internationalphoneticassociation.org/IPAcharts/IPA_chart_orig/IPA_charts_E.html
下面是交互式国际音标表网站，可以听 4 位前辈的发音示范：
https://www.internationalphoneticassociation.org/IPAcharts/inter_chart_2018/IPA_2018.html
时态
常用的16种时态：
-般现在时：I do my homework
现在进行时：I am doing my homework
-般将来时：I will do my homework
-般过去时：I did my homework
现在完成时：I have done my homework
过去进行时：I was doing my homework
过去将来时：I would do my homework
过去完成时：I had done my homework
将来进行时：I will be doing my homework
将来完成时：I will have done my homework
将来完成进行时：I will have been doing my homework
过去完成进行时：I had been doing my homework
过去将来进行时：I would be doing my homework
过去将来完成时：I would have done my homework
现在完成进行时：I have been doing my homework
过去将来完成时：I would have been doing my homework
短语
疑问词集合：
问什么 what
问原因 why
问哪里 where
问哪个 which
问谁 who
问谁的 whose
问颜色 what color
问几点 what time
问星期 what day
问时候 when
问怎样 how
问年龄 how old
问多少 how many
问价格 how much
问多重 how tall
问多大 how big
问多长 how long
九个决定：
decide to do sth.
make a decision to do
determine to do sth.
be determined to do sth.
make a determination to
resolve to do sth.
make up one's mind to
set one's mind to do
九个准备：
get ready for sth.
get sth. ready for sth.
be ready for sth.
be ready to do sth.
prepare for sth.
prepare oneself for
prepare to do sth.
prepare sth.for sb.
be prepare for sth.
八个著名：
be famous for sth.
be famous to sb.
be famous as
be famous to do sth
be known for sth.
be known to sb.
be known as
be known to sb. as
五个观点：
in one s opinion
to one s mind
in one s view
in one s eye
according to sb.
五个劝阻：
stop sb. doing
prevent sb. doing
keep sb. from doing
discourage sb. from doing sth.
dissuade sb. from
五个乐意做：
be glad to do sth.
be pleased to do sth.
be happy to do sth.
be delighted to do
have pleasure to do
五个为了：
so that
in order that
so as to do sth.
in order to sth.
to do sth.