Dave's ESL Cafe's Student Discussion Forums

[puzzle]

Dear teachers,
Can you tell me the differences between the past indefinite tense and the past perfect tense? Which is the best answer of the following exercise?
---How long ______ in Australia?
---- Eighteen months. I came back last spring.
A. had you studied B. did you study?
Thank you very much!

[redset]

There are a quite a few differences, have a look at these:
http://www.englishpage.com/verbpage/simplepast.html
http://www.englishpage.com/verbpage/pastperfect.html

Then see if you can work out the correct answer