引导条件状语从句的连词(重点)：1）条件状语从句主要由if, unless, supposing(suppose)引导：if: If it rains tomorrow , we will have to stay at home.unless: I wont write unless he writes first. 我不写信，除非他先给我写。2）条件状语从句还有其他形式：(难题)You will always have a home as long as I have anything.只须我有家产，你就永远会有一个家。
