卫生类：复习笔记although与though
(1)although与though可以引导让步状语从句，不能与but连用，但可以与yet连用.
Although they are poor，(yet)they are warm-hearted.
(2)even if或even though引导让步状语从句，表示"即使"，"纵然"，用来使人注意下文所强调内容的性质.
Ill get there even if(though)I have to sell my house to get enough money to go by air.
(3)no matter后接上who、what、where、how等疑问词，也可以在这类疑问词后面加上ever构成whoever、whatever、wherever、however等.
Dont trust him， no matter what / whatever he says.
Whoever breaks the law will be published.
No matter how hard the work is， youd better try to do it well.
(4)as也可以引导让步状语从句.要用倒装.
Child as(though)he is， he knows a lot.
Much as I like it， I wont buy.
Try as he would， he couldnt lift the heavy box.