翻译:上周我买了一辆自行车.(英文)

I bought a bicycle last week.

I bought a bicycle/bike last week.

bought是buy（买）的过去式

bicycle与bike是同义词

时态由时间副词last week（上周）决定，这里使用过去时

注意last week前不加冠词

T bought a bicycle in last week
（因为是上周 要注意过去式） 恭喜发财
把分拿来!!!

T bought a bicycle in last week
（因为是上周 要注意过去式）

I bought a bicycle last week.

I bought a bicycle last week.