The adverb 唯独 "only"
The adverb 唯独 
can be placed before either the sentence’s subject or a predicate expressed by a verb.
It is often placed at the beginning of the second part of a sentence.
can be placed before either the sentence’s subject or a predicate expressed by a verb.
It is often placed at the beginning of the second part of a sentence.Examples
全家都去北京旅行，唯独他留在家了
The whole family went to Beijing. Only he stayed at home
quán jiā dōu qù běijīng lǚxíng, wéidú tā liú zài jiā le
我什么都不要，唯独需要朋友的支持
I need nothing but my friends’ support
wǒ shénme dōu bú yào, wéidú xūyào péngyou de zhīchí
我可以吃酸的，唯独不可以吃辣的
I can eat sour food. I just can’t eat spicy food
wǒ kěyǐ chī suān de, wéidú bù kěyǐ chī là de
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