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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
1-17P.4
Teacher's
Tips
Hour 16
Hour 18