as long as的用法时态

as long as指导的是条件状语从句，意思是“只要”，以是，状语从句能用的时态都可以用，除了不能用一样平常未来时。由于在条件状语从句中，需要用一样平常现在时取代一样平常未来时。

as long as的用法

1.示意条件，意思是“只要”。如:

As long as you tell the truth，I’ll try to help you.

只要你告诉我真相，我会全力辅助你。

You may take this book away so long as you return it on time.

只要你准时送还，就可以把这本书拿走。

2.示意缘故原由，意思是“既然，由于，由于”。如：

1. As long as we've driven this far, we might as well go on.

我们既然已经驶得这么远了，就不妨继续前进。

2. As long as you are going, I'll go too.

既然你要去，那么我也去。

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3.As long as the weather is changeable these days,we’d better get in wheat in time.

由于这几天天气转变无常，我们最好实时把麦收割完。

as long as和so long as的区别

1.as long as 和 so long as 均可示意“只要”，用于指导条件状语从句，两者没什么区别。如：

I don't care so/as long as she lets me be with her son.

只要她让我和她儿子在一起，我不在乎。

You can take my car as/so long as you drive carefully.

你可以用我的汽车，只要你小心点儿开。

You may use my dictionary as/so long as you don't keep it too long.

只要使用时间不太长，你可以用我的词典。

2.当 as long as 用于本义示意“与……一样长”时，与 so long as 在用法上是有区其余，即 as long as 可用于一定句或否认句，而 so long as 只用于否认句，不用于一定句。如：

It took three times as long as I had expected.

这件事比我预料的多花了两倍的时间。

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