(1) First/Firstly/First of all/first off,second/secondly,third/thirdly……,finally /lastly /last/in the end 注意：并不要求first后面必须跟second,third,然后firstly后面必须跟secondly，thirdly，口语中实际上比较随便，很多都可以互相混用，例如first后面可以继续跟secondly，thirdly，或者first off后面跟second，third，再或者firstly后面跟the 2nd thing等。