12.both…and 和，既…也 并列主、谓、宾及表语 I can play both football and basketball.
13.nor 也不，引导句子要倒装 He can not speak English, nor can I.
You like apples, so do I.
二、从属连词：
1. after 表示“时间”，在…之后
After I finished the school, I became a worker in the factory.
2.although/though 表示让步， “尽管” Although she is young, she knows a lot.
3.as 表示时间，“当…时”，方式“象…”，原因，“由于、因为”让步，“尽管、虽然”
As it was late, we must go now.
4.as if/as though 表方式，“似乎、好像”
He told is such a story as though he had been there before.
5.as long as/so long as 表条件，“只要” As long as I am free, I’ll go to help you.
6.as soon as 表时间，“一…就…” I will phone you as soon as I come back.
7.because 表原因，“因为” I have to stay in bed because I am ill.
8.before 表时间，“在…之前“ You should think more before you do it.
9.even if/ even though 表让步，“即使” You should try again even if you failed.