1.翻译：他花了半个小时做衣服.
2.同义句：
He made clothes for two quarters.
= He made clothes for half an hour.
= He made clothes for thirty minutes.
3.quarter在此句中意思是“一刻钟”,所以two quarters“两刻钟”= half an hour“半小时” = thirty minutes“三十分钟”.