杜老师已经教我们英语两年了 他去年去北京了 他在哪?他已经去上海了 帮忙翻译成英文 要现在完成时

Mr. Du had taught us for two years. He went to Beijing last year. Where is he? He has gone to Shanghai.He went to Beijing last year.这句是现在完成时吗 ？这个是一般过去时你要是非要用完成时可以说 He has been in Beijing since last year.He has gone to Beijing since last year.但这里用完成时是不合适的。