Speak it!
John had been opening attachments from unreliable sources for months before someone told him it was dangerous
Explain it!
We use the past perfect continuous to express an action which started in the past and was still cntinuing before some other action was taken
Write it!
Hackers had been accessing company data before the company installed a firewall
What had hackers been doing before the company installed a firewall?
Answer: accessing company data
What had hackers been accessing before the company installed a firewall?
Answer: company data
Before they installed what, had hackers been accessing company data?
Answer: a firewall
Train it!
Imagine you are a shop keeper: what can you do to protect yourself from criminals …?
~ install an alarm system
~ use CCTV cameras in the shop
~ keep a baseball bat behind the counter
~ keep a gun behind the counter
…and cyber criminals?
~ install a firewall
~ don’t answer emails from fraudsters
~ install anti-spam in my email accoutn
~ don’t open links in an email you don’t know who sent it