Dave __ (learn) Chinese since two years ago

Dave __ (learn) Chinese since two years ago I started to learn English since two years ago.问问大家这句话有语法错误吗 SINCE TWO YEARS AGO的同义句 the swimming club opened two years ago（用since two years ago since two years ago与since two years的区别,分别用在什么时态? Mr green has ()us English since two years ago They ___(live) there since two years ago How long ___ your mother ___?Since two years ago. Since they(visited/have visited)hangzhou two years ago,they( Lily with her parents______Oxfam since two years ago. since two years ago 它是一个时间点 还是一个时间段? __ three years ago.A,since B,for C,about