从属连词2. 引导条件状语从句的连词

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2. 引导条件状语从句的连词
　　1）条件状语从句主要由if, unless, supposing(suppose)引导：
　　if:
　　I must leave if that’s the case.  如果情况如此我就得走了。
　　He will come if asked. 如果邀请的话他会来的。
　　unless:
　　I won’t write unless he writes first.  我不写信，除非他先给我写。
　　I’ll go there tomorrow unless it rains.  除非下雨，否则我明天去那里。
　　supposing:
　　Supposing that he asks you, will you go?  假定他请你去，你会去吗？
　　Supposing his plan goes wrong, what will you do then?
　　
　　suppose:
　　Suppose she finds out, what shall we do then?  假如她发现了，我们怎么办？
　　Suppose you lost your job tomorrow, what would you do?  假定你明天失业，你怎么办？
　　provided:
　　I will agree to go provided(providing) (that) my expenses are paid.
　　如果有人给我掏路费我将同意去。
　　She agreed to go and work there provided that her family could go with her.
　　providing:
　　I’ll dry the dishes, providing that you do the washing-up. 如果你刷盘子，我就将它们擦干。
　　2）条件状语从句还有其他形式：
　　You will always have a home as long as I have anything.
　　只要我有家产，你就永远会有一个家。
　　They’ll stand by you even if you don’t succeed. 即使你不成功，他们也会支持你。
　　此外，as long as, so long as, in case, even if 都起连词作用。