The conjunction and the adverb 同时
The conjunction 同时
The conjunction 同时 
is used to indicate that there are other circumstances as well.
It connects parts of a simple sentence with a compound predicate.
is used to indicate that there are other circumstances as well.
It connects parts of a simple sentence with a compound predicate.Scheme
subject
A
同时
B
Pay attention
The adverbs 也 , 还 and 又 are often placed after 同时.
, 还 and 又 are often placed after 同时.Examples
大家要努力工作，同时也要注意身体
Everyone has to work hard, and they need to pay attention to their body as well
dàjiā yào nǔlì gōngzuò, tóngshí yě yào zhùyì shēntǐ
他不但是我们的老板，同时还是我们的朋友
He is not only our boss, but he is also our friend
tā búdàn shì wǒmen de lǎobǎn, tóngshí hái shì wǒmen de péngyou
她看上去如此漂亮，但同时又那么孤傲
She look so beautiful, but at the same time she looks so aloof
tā kànshàngqu rúcǐ piàoliang, dàn tóngshí yòu nàme gū'ào
The adverb 同时
同时 can also be an adverb “at the same time”. In this case, it is placed before a verb.
Examples
同时做几份工作的人
People who do several jobs at the same time
tóngshí zuò jǐ fèn gōngzuò de rén
比赛将同时在电视和广播中进行转播
The match will be broadcast on both TV and radio
bǐsài jiāng tóngshí zài diànshì hé guǎngbō zhōng jìnxíng zhuǎnbò
他们班和我们班要同时进行考试
Both their class and our class have to pass exams at the same time
tāmen bān hé wǒmen bān yào tóngshí jìnxíng kǎoshì
The structure 在…的同时
同时 can be used in the 在…的同时 structure to indicate that the first action happens simultaneously with the second action.
structure to indicate that the first action happens simultaneously with the second action.Examples
在口语水平提高的同时，我们的听力水平也有很大的提高
In addition to the improvement in our speaking level, our listening skills have also improved significantly
zài kǒuyǔ shuǐpíng tígāo de tóngshí, wǒmen de tīnglì shuǐpíng yě yǒu hěn dà de tígāo
大夫告诉我，在吃药的同时，一定要多喝水、多休息
The doctor told me that while taking medicine, I need to be sure to drink more water and rest more
dàifu gàosu wǒ, zài chīyào de tóngshí, yídìng yào duō hē shuǐ, duō xiūxi