a. Are you going to have the contest today or tomorrow?
b. Do you have your coaching in the evening or in the afternoon?
c. Hurry up, or we'll be late.
At first she didn't want to go. Later, however, she changed her mind.
1.并列连词:用来连接平行的词、短语或分句。常见的并列连词有and, but, or, nor, so, therefore, get, however, nevertheless, for, hence, as well as, both...and, not only...but also, either...or, neither...nor, (and) then。
2.从属连词:用来引起一个从句在句中担任一个成分。常见的从属连词有after, when, before, as, while, since, until, till, although, though, if, even if, unless, lest, because, than, that, whether, so that, as soon as, as long as, in order that, as if, as though, suppose (that), provided (that), in case (that), on condition (that), now that, seeing that, so...that, such...that, as...as, so...as 等。