1. 别担心。

[ bié dān xīn 。 ]

Don't worry.

2. 难道你不担心吗?

[ nán dào nǐ bù dān xīn ma ? ]

Aren't you concerned about it?

3. 我担心他喝的酒太多了。

[ wǒ dān xīn tā hē de jiǔ tài duō le 。 ]

I fear that he drinks too much.

4. 他担任着一个责任重大的职务。

[ tā dān rèn zhuó yī gè zé rèn zhòng dà de zhí wù 。 ]

He holds a position of great responsibility upon him.

5. 别担心，你两天之内就会痊愈的。

[ bié dān xīn ， nǐ liǎng tiān zhī nèi jiù huì quán yù de 。 ]

Take it easy, you will be all right in a couple of days.