even if、even、though 即使,尽管
although、though、as 虽然,尽管
不能与but连用,可以和yet连用
倒装:n/adj/adv/分词+as/though+主+谓 注意:n/adj/adv/分词之前不能有冠词
无论...,不管... ;疑问词+ever=no matter+疑问词; whoever/whatever/whichever/whomever/wherever/whenever/however=no matter who/what/which/whom/where/when/how