The verbs 变得, 变成, and 成为
The verbs 变得, 变成, and 成为 have the same meaning “to become”, but differ slightly in usage.
The verb 成为
The verb 成为 
indicates a positive and gradual change.
In a sentence, 成为 is placed before either a noun or a noun phrase.
indicates a positive and gradual change.
In a sentence, 成为 is placed before either a noun or a noun phrase.Examples
他教了几年书之后成为作家
He became a writer after several years of teaching
tā jiāo le jǐ nián shū zhīhòu chéngwéi zuòjiā
保健已经成为大生意
Healthcare has become big business
bǎojiàn yǐjīng chéngwéi dàshēngyi
泰国已经成为亚洲旅游胜地
Thailand has become a tourist destination in Asia
tàiguó yǐjīng chéngwéi yàzhōu lǚyóu shèngdì
The verb 变成
The verb 变成 indicates a negative and sudden change.
In a sentence, 变成 is placed before either a verb or a verb phrase.
indicates a negative and sudden change.
In a sentence, 变成 is placed before either a verb or a verb phrase. Pay attention
The verb 变成 is usually used in the past tense. Therefore, 变成 must be followed by the particle 了 .
.Examples
我们梦想的假日变成了一场噩梦
Our dream holiday turned into a nightmare
wǒmen mèngxiǎng de jiàrì biànchéng le yì chǎng èmèng
他的病房变成了牢笼
His ward turned into a prison
tā de bìngfáng biànchéng le láolóng
水变成了冰
The water turned into ice
shuǐ biànchéng le bīng
The verb 变得
The verb 变得 indicates a change of state.
We can use the verb 变得 when we are talking about people, objects or the environment.
indicates a change of state.
We can use the verb 变得 when we are talking about people, objects or the environment. Pay attention
In a sentence, 变得 is usually placed before an adjective.
Examples
脾气变得暴躁起来
To become irritable
píqi biànde bàozào qǐlái
这座城市已变得破败不堪
The city has fallen into decline
zhè zuò chéngshì yǐ biànde pòbài bùkān
秋天来了，天气变得凉爽多了
The weather got colder with the onset of autumn
qiūtiān lái le, tiānqì biànde liángshuǎng duō le
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