如果你在过去 4 年内一直在工作，那么你可以说：
"I have been working for four years."
或者：
"I have been employed for four years."
如果你想要说明你的工作内容，你可以说：
"I have been working as a [job title] for four years."
例如：
"I have been working as a software developer for four years."
希望这能帮到你！
"I have been working for four years."
或者：
"I have been employed for four years."
如果你想要说明你的工作内容，你可以说：
"I have been working as a [job title] for four years."
例如：
"I have been working as a software developer for four years."
希望这能帮到你！