连词例子：
1. To indicate a time or frequency or amount：
in general， every， some， after， on the whole， usually， most， at other times， in most cases， frequently， main， finally， as a rule， rarely， before， meanwhile.
2. To indicate an addition：
additionally， as well as， just as， again， along with， also， further， furthermore， likewise， in the same manner， in the same way， in addition to，
3. To introduce an example：
for example， namely， for instance， as an example， that is
4. To indicate a contrast or difference：
although， instead， rather than， but， nevertheless， though， however， on the other hand， otherwise
5. To indicate a conclusion：
all in all， in consequence， in brief， as a result， the point is， in conclusion， therefore， hence， in sum.
，托福写作专攻:连接词的妙用