这个原因也是因为中国同学受到各地方言里的影响，发/ɔ/变成了一件非常困难的事情，不但忘了汉语拼音里有类似的音，还时常喜欢加一些本土风情。举个栗子：

Cause  [kɔz]

练习：

Where is the watch I put in my pocket to take to the shop because it had stopped?

At the dock I'm shocked to see the pocket rocket made of a block of rock.

Tom has got a lot of dots on his pocket.If he wants to wash off the dots,he will use a pot of hot water.

/i ə/ 作为开合双元音，口型先合后开，很多同学会忘记第二个元音/ə/。举个例子：dear /dɪə(r)/

练习：

I shed tears for he shears my dear toy deer's ear.

Next year the bearded bear will bear a dear baby in the rear..

During this serious period ,the superior asked the inferior a series of questions about the supermarket.

/ə/作为前元音，常常会被误会成他的兄弟/e/和大哥/ei/, 中国同学也很难发准确这个音节。举个例子：

panda /'pændə/ 

练习：

An elevator on Everest is an Everest elevator.

I correctly recollect Rebecca MacGregor's reckoning.

Elizabeth has eleven elves in her elm tree.