1We will be excepting you ____ us this summer vacation

except [简明英汉词典]
[ik5sept]
vt.除,把...除外,反对,不计
vi.反对
prep.除了...之外,若不是,除非
conj.只是,要不是
EXCEPT [简明英汉词典]
[ik5sept]
[计]“禁”门,“与非”门
excepting [简明英汉词典]
[ik5septiN]
prep.除...外
conj.除非,除...之外

Dayna:My subject is art and I expect I can master all the necessary knowledge
before I start my own artwork shop.
Allen:That is ambitious.For me I only expect to graduate on time.I don't
think I have learnt anything in university.My subject is sport science
because I love sports.

The issue of the achieving success is an emotional one,consisting of many factors,among which university education might be the most important one.
First,university education gets you prepared for the career.Advanced education is the last step before you enter the society.University education often provides substantial academic courses and study opportunities that simulate the most virtual experience in real case scenarios.This kind of experience is almost cost-free and moreover it can be the most significant acquisition for the career in the future and even the whole life.
Second,communication skills could be obtained from the curriculums.Students who are able to establish good relationship with their classmates,fellows and professors are most likely to achieve in their future life.According to a recent survey conducted by China Academy of Social Sciences among 1000 students graduated from 50 universities in China,up to ninety percent of them who are with admiring achievements later showed a good command of communication skills when they were in the undergraduate period.Researchers believe that these achievements mainly benefit from the good education they got in the university.
Finally,university education is also a valuable life experience.Students may master how to deal with all the problems they encountered both in and off the campus which makes them good adaptors and quick learners in the consequent life time.
From what I mentioned above,we could believe that university education counts to a person's success in life.

意思一样,形式不同,肯定有区别,不同的句子具体用哪个,要看整个句子.
+ing表示伴随状态,而except就是一般的不定式.

excepting是由动词转化而来的分词介词,看作介词词性,用法较正式,含有较强的动态意味.
excepting for 除了...之外
常用语句首,也可用在always,not,without等后