the last lesson
since the last lesson
I was five
since I was five
Christmas
since Christmas
six months
for six months
two hours
for two hours
ten years
for ten years
one month
for one month
my birthday
since my birthday
last summer
since last summer
lunch-time
since lunch-time
the beginning of the term
since the beginning of the term
we moved to this town
since we moved to this town
a week
for a week
8 o'clock
since 8 o'clock
ten minutes
for ten minutes
three minutes
for three minutes
we met last time
since we met last time
October 10th
since October 10th
ages
for ages
a long time
for a long time