英语请假两天怎么说

To request a leave of absence for two days in English, you can say:
"I would like to request a leave of absence for two days. Is that possible?"
Alternatively, you can say:
"I need to request a leave of absence for two days. Could I do that?"
It is always a good idea to provide a reason for your request and to be respectful when making it. You might also want to confirm the process for requesting a leave of absence and any necessary paperwork that needs to be completed.