同学你好，该知识点来自沪江网校《目标雅思7分：60天冲刺提分【VIP促学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
as long as是只要，只要满足了某个条件，就能做某事
You can borrow my car as long as you promise to drive slowly. 你可以借我的车，只要你答应开慢一点。
They'll respect you as long as you play fair. 只要为人正直，别人就会尊敬你。

unless 除非，除非你做某事，不然另一件事就会发生
You will be late unless you leave immediately. 除非你立即离开，否则你会迟到的。
You won't get paid for time off unless you have a doctor's note. 除非你有医生证明，否则你不上班便拿不到工资。

祝同学学习进步~