"Fill out a form" or "complete a form" 是填写表格的常用表达方式。"Fill out" 是动词短语，"out" 是副词，意思是"完成，做完"，"form" 是名词，意思是"表格"。

举个例子：

Please fill out this form and bring it to the office when you come in for your appointment. (请填写这份表格，并在来预约时提交。)
Can you fill out this form and email it back to me by tomorrow? (你能填完这份表格，并在明天之前通过电子邮件发回给我吗？)

"Complete a form" 也是填写表格的常用表达方式，"complete" 是动词，意思是"完成"，"form" 是名词，意思是"表格"。

举个例子：

Please complete this form and return it to us by the deadpne. (请填写这份表格，并在截止日期前返还给我们。)
I need you to complete this form and send it back to me as soon as possible. (我需要你填写这份表格，并尽快发回给我。)

希望这些信息对你有帮助。