Question

as there was no wind

求句子分析
The sun shone brightly and the birds kept perching on the trees which,as there was no wind,made no stir.Suddenly a dark cloud hid the sun.
请问“which”和“as”在这里是什么意思,有什么注意的句子结构吗?
书上解释which指代the trees，可我还是不懂which在这里做什么。

Answer 1

太阳明亮的照耀着,鸟儿栖在枝头,因为没有风,树枝一动不动.忽然,一片乌云遮住了太阳.
as there was no wind是插入语,说明树枝不动的原因是没有风
现在先把这个插入语移开,这个句子就好分析了.
The sun shone brightly and the birds kept perching on the trees which made no stir.
Suddenly a dark cloud hid the sun.
which引导的是定语从句: which made no stir. 修饰the trees.
the trees是先行词,which是引导词.
引导词which的作用有三个：1.指代先行词the trees, 就是which指的就是the trees 2. 连接主句和从句 3. 在从句which made no stir中作主语.
as 在这里的意思是“因为”
as there was no wind是插入语.
要好好看下定语从句的相关语法.