尊敬的_______：
Dear _____,
您好!我班于20xx年11月19日(星期二)中午12点在校门口/下午3点在图书馆门口拍毕业照，诚邀您与我班一齐合影留念。希望您能在百忙之中抽空参加合影。
It would be our great pleasure to have your presence to have graduation photos with us at 12:00 p.m. on the front of the School Gate, or 15:00 p.m. on the front of the Library on November 19th (Tuesday), 20xx. We will highly appreciate if you can spend your precious time taking photos with us.
期待您的到场!
We all look forward to your presence.
您可爱的
Yours,