英语翻译4种（1）他哥哥参军3年了（2）会议结束半个小时了.2个句子都用4种方式表达

Question

英语翻译4种（1）他哥哥参军3年了（2）会议结束半个小时了.2个句子都用4种方式表达

Answer 1

1)
His brother joint the army 3 years ago.
His brother has been in the army for 3 years.
It was 3 years ago when his brother joint the army.
It has been 3 years since his brother joint the army.
2)
The meeting was over for half an hour.
The meeting ended half an hour ago.
The meeting has been over for half an hour.
It has been half an hour since the meeting ended.
我努力试了一下,不好也请谅解~