这名罪犯因该罪行正在服六个月的刑期。

The offender is ___serving a six-month sentence for the crime.

在服刑期间，他完成了学业。

While ___serving a prison term, he completed his education.

她目前已服刑三年，明年将被释放。

She has ___served three years so far and will be released next year.