an hour ago和an hour later有什么区别?

an hour ago和an hour later有什么区别? tom ____(play)football an hour ago an hour ago 算不算段时间 since 还是 for an hour ago They left an hour ago变成现在完成时 half an hour ago 什么意思? Jim finished ( ) his homework an hour ago It started to rain an hour ago half hour =half an hour half hour half an hour 的意思有和区别? Miss Gao left an hour ago 同义句转换 Miss Gao an hour ago Miss Gao left an hour ago的同义句 Miss Gao _____ an _____ hour ago. Sorry,I ordered my food half an hour ago.对“half an hour ago”提问 an hour early 和 an hour earlier 的区别? in an hour和after an hour用法分别是什么 in an hour和within an hour的区别 for an hour 和an hour有什么不同. He was here().A.half an hour before B.half hour ago C.half an hour ago How long has peter been reading the book?选项再补充A an hour agoB before an hour agoC since an hour agoD for an hour ago