tips:如同编程一样的语法
让步状语，代表前面不太重要，后面重要
even / although / even though/ no matter/ whatever/ despite。。。
/ Nonetheless/ anyway/ still/ but/ where as/ however/ except
小反转
prefer / than / better/ instead/ rather/ more
replace a with b(用b换a) a to b(用a换b）/ instead of/ take place of/ rather than
if statement(先说结果）
because/ for/ since/ cause/ in terms of/ according to/ follow/ by
（假设）think/ suppose/ assume/ if/ as if/ what if
lead to / cause/ so/ so that / so ...that/ consequently/ purpose of/ in order to/
otherwise/ other/ or else
opposite/ on the contrary[ˈkɒntrəri]/ in contrast to/ by contrast/ con'versely/ reverse
&&，||这些
moreover/ in addition/ then/ also/ as well/ too/ meanwhile / at the same time/ and/ together/。。。or
either...or/
neither...nor/ none of
循环条件：
until（注重时间)/ unless(注重条件）