半年前英语

I was here half of a year

six months 或者 half a year 但其实具体要看语境，还不只这样，下面的你可以感受下：不同的地方用几种用法：1. 结果：小切口阑尾切除手术效果满意，随访半年未见任何并发症。Results All the patients were satisfied with the operations and they were followed up for a half year withoutany complications. 2. 经半年以上工业运行试验，各项技术指标达到新型滤泥板技术要求。All the technical specifications have reached to the technical requirements of the new filtering plate aftermore than half year's industrial operational tests. 3.阿尔茨海默病患者甲状腺激素变化与胆碱酯酶抑制剂的干预作用开放分组，半年随访，盲法评估。Cholinesterase inhibitors for the changes of thyroid hormone levels in patients with Alzheimer disease: opengrouping, half-year follow-up, blind evaluation. 4.随访半年，治愈的病人未见瘢痕复发。Following up for half of a year,no scar relapse was observed in the treated scars effectively.5.中共中央能根据形势的变化在短短的半年多时间内及时调整了政策，这正是我党具有这种优秀品格特性所决定的。The Central Committee of CPC adjusted the policies in only half a year according to the changes of situations, which just showed the good qualities of the Party.

six months ago或者是half a year ago

last year 2 this year 3 two days ago 4 half year ago 5 Half a day before6 four month ago 7 the year before last8 the day before yesterday

About half a year ago,....