Hi,
In the sentence:
By 2008, the percentage of students choosing science subjects decreased/had decreased markedly.
I chose past simple (decreased).
Which one is correct please, and why?
"had decreased" is the better choice. ". The "now" of the sentence is visualised to be 2008, and the decrease happened before this, so the past perfect is indicated.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
"had decreased" is the better choice. This is governed by "By 2008, ...". The "now" of the sentence is visualised to be 2008, and the decrease happened before this, so the past perfect is indicated.