Hour 17
How long ago q?
How long was it before you v (past)?
After how long q?
In how long q?
How long will it be before you v?
How long q?
For how long q?
How long q for?
How long does it take to v?
How often q?
How long has it been since you v (past)?
How long is it since you v (past)?
When was the last time you v (past)?
When is the first time you v (past)?
When is the next time you will v?
Intro
You
Part 1
17
17Q
1-17Q
1-17P
1-17P.1
1-17P.2
Test
Review 17
1-17P.3
Teacher's
Tips
