for a long period

since a long period

since 6 years

for 6 years

since she was a child

for she was a child

since the beginning of this year

for the beginning of this year

for 10 o'clock

since 10 o'clock

for the end of last year

since the end of last year

for ages

since ages

for eight months

since eight months

for he got up this morning

since he got up this morning

since last August

for last August