照片用英语加复数怎么说

In English, we use the word "photos" as the plural form of "photo." So if you are talking about multiple photos, you would say "photos." For example:
I took a lot of photos on my vacation.
She has a collection of old photos from her grandparents' wedding.
We need to upload the photos from our event to the website.
Note that "photo" is a shortened form of "photograph," and both words can be used interchangeably.