Question

His earnings were only half the amount as they used to be. 为什么as错？？

His earnings were only half the amount as they used to be. 为什么as错？？

Answer 1

改正：as 应该改成 that

解释：__ they used to be 为定语从句，修饰先行词 the amount；其中该从句的关系代词代替先行词 the amount，在从句中充当 used to be的表语。根据定语从句的相关语法，如果先行词被 such/so/as/the same修饰时，关系代词才会使用as，所以此处只能使用that（关系代词在定从中做表语时只能用 that）；如果理解成倍数句型，则必须是 as... as才行，但是此句还缺少另外一个as

追问

可是像这样的句式，为什么As就可以随便用呢？ He lost his job as you might

追答

这个句子如果单独看，是不完整的。如果有上下文的对应句，才能看出它省略了什么成分，也才能准确理解as在此处的用法功能

追问

就是“如你所看到的 as you can see”或者“如你所愿 as you wish”，不都是As开头的吗，那“如他过去赚得一样”为什么不可以了as开头了呢？

追答

人家都是逗号隔开的，属于非限制性定语从句用法

Answer 2

His earnings were only half the amount of they used to be.他的收入只有过去的一半。
因为the +名词+of +比较对象是固定的
as +原级+as

Answer 3

as改为as much as
他的收入只有他过去的一半多