下半年用英语可以说作"the second half of the year"。这个说法来源于英语中"half"这个单词有"一半"的意思，因此"下半年"可以直接翻译为"the second half of the year"。

例句：

I'm looking forward to the second half of the year. (我期待着下半年的到来。)

Many people make New Year's resolutions at the beginning of the second half of the year. (许多人会在下半年开始时作出新年决心。)

The second half of the year is often a busy time for businesses. (对于企业来说，下半年通常是忙碌的时期。)