正确发音小技巧
发/ts/时，嘴巴稍张开，用舌抬起，先抵住上齿龈，然后突然下降抵过下齿，气流随即泄出口腔，形成先破后擦的声音，有点像汉语拼音”ci”的声音。这是一个清辅音。

发/dz/时，口型与/ts/一样，但这是一个浊辅音，有点像汉语拼音”zi” 的声音。

这两个音一般用在单词后面加“s”后的发音，共同的特点是：舌尖从牙缝抵出，/ts/通地气流发声，/dz/通过喉咙发声。

/ts/ cats students lots seats hats
/dz/ cards words birds friends hands

唇舌训练：
It's raining cats and dogs; the students can only stay on their seats and waiting.
/ts/ /ts/ /ts/
I have lots of words to tell my friends, and I write them down on these cards.
/ts/ /dz/ /dz/ /dz/
Lots and lots of birds and cats are around the students.
/ts/ /ts/ /dz/ /ts/ /ts/
We're wearing hats to meet our friends who happen to wear hats too.
/ts/ /dz/ /ts/
Our friends are holding lots of blank cards in their hands.
/dz/ /ts/ /dz/ /dz/

单词中字母的发音规律
一般发/ts/的字母 ts boats, shots, coats, students
一般发/dz/的字母 ds beds, hands, seeds, friends
des attitudes

发音与朗读训练
（在做以下朗读练习时，请注意黑体单词中画线字母的发音）
Friends Are Gifts 朋友是礼物
Friends are gifts that you give yourself.
/dz/ /ts/
朋友是你能给予的最好的礼物。

Friends don't have to put up with your attitudes if they don't want to.
/dz/ /dz/
当朋友不情意时，他们便不必要去容忍你的态度。

Friends can leave you hanging if you're not very nice towards them.
/dz/ /dz/
如果你对朋友不友善，他们也可以对你置之不理。

Friends aren't friends for very long if you're embarrassing them in public.
/dz/ /dz/
如果你在大庭广众之下令你的朋友难堪，那么你们不会维持太久的朋友关系。

Friends usually won't scream at you to get their points across.
/dz/ /ts/
朋友通常不会通过对你大吵大嚷来求得理解。

You handpick your friends to be something different and special.
/dz/
你精心挑选那些对你来说特殊的人作你的朋友。

In order to have friends, you have to be a friend.
/dz/
为了拥有朋友，你必须自己是个朋友。

You have to give a lot of yourself to be a good friend to someone.

你必须从你自身出发去给予以便成为他人的好朋友。

But in the end, you are the one who benefits the most.
/ts/
那么最终，你会获取很多。