Question

昨晚我用了一个小时写作业用英语怎么说

Answer 1

1、I spent one hour doing my homework last night.
(相关知识点：spend+一段时间＋doing sth. 花多长时间做某事）
2、It took me one hour to finish my homework last night.
(相关知识点：It takes sb+一段时间＋to do sth.某事花费某人多长时间)

Answer 2

I have done my homework during one hour last night.

追答

如果作业没有做完:
Last night I spent an hour on my homework.