Intermediate - Useful expression for job
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While
"While" expresses that something is happening at the same time as something else; two things are happening at once.

1- She likes to work on her laptop while she's on vacation.

2- This dog is sitting patiently and waiting while her owner puts on her leash

3- While he's at work, he wears a hardhat.

4- This police officer wears a uniform while he's on duty.

5- While I wait for my apple trees to produce apples, I grow vegetables.

While (n) : a period of time
6- It takes quite a while to get back home.

7- They stayed at the party for a short while

8- They will be gone for a while

9- She will be back in a while.

References : http://www.englishcollocation.com - http://dictionary.reference.com - http://www.learnamericanenglishonline.com/


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