now past I began to teach English 24years ago.=I have taught English for 24 years. I am teaching English now.=I have taught English since 24 years ago.我 教了 英语24年了 .（含义：1.我在过去某个时间开始教英语 2. 我现在还在教英语。）now past I began to study English 8years ago.I have studied English for 8 years. I am studying English now.I have studied English since 8 years ago.How long have you studied English ?now past I moved to Dongguan in 2007.I have lived in Dongguan for 10 years. I am living in Dongguan now.I have lived in
