as for是“至于”,是介词后可接名词,代词,和动名词.
As for me,I don't care about it.
with是“同,与,和,跟”是介词,后接名词,和代词.
talk with a friend
与朋友谈话
learn farming with an old peasant
跟老农学习种田
fight [quarrel,argue] with sb.
跟某人打架[争吵,辩论]
though"虽然,尽管,纵然,即使"是连词,即要连接一个从句.
I will try it,though I may fail.
即使我可能失败,我也要试一下.
虽然；纵然；即使；尽管
Though it was raining,he went there.
虽然当时正下着雨,他还是到那里去了.
Though he was poor he was happy.
虽然他很穷却很快乐.
as though ...恰如,好象
even though即使,纵然
What though ...尽管...有什么要紧[关系]?