a great tenses realted doubt,please clarify

Question

recently i read a grammar book.in that i found this sentence about past perfect continuous:
i had been working in England for 5 years before i joined this company two years ago.

i could understand why they used had been,but MY DOUBT IS:

why not use the following sentence instead the one above,

i was working in England before i joined this company two years ago.

if i cant use the second type,please tell me why i cannot not(should not!).again,whats the difference between these two sentences in the way they convey the meaning.

thanks in advance.

Marius Hancu · Accepted Answer

Both work, but the original offers more clarity for recognizing the sequence of actions.

CalifJim · Answer

You can use was working instead of had been working if you want. The word before makes it clear what the time sequence is.
__________

Please capitalize I and the first word of each sentence.
This is an English forum, so following the standards of written English is important.
__________

CJ

David Little · Answer

Thank you Mr.Marius Hancu.My thanks to Mr.CalifJim for teaching me a valuable lesson.I"ll follow it.

a great tenses realted doubt,please clarify

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