if,although,unless,aslongas的区别

Question

if,although,unless,as long as的区别

Answer 1

if 是如果,主将从现,如：If it rains tomorrow , we will not go out . although 是尽管,表示转折,不和but 连用 如Although he is ill ,he still works hard . unless 是“除非”得意思,如You cannot go out unless you finish your homework as long as 是“只要”或“和……一样长”的意思