I spent as much as he did.
I spent as much as $100.
I spent as much money as he did.
I spent as much money as $100.
请教老师这四句都对吗？第二句比较项没省略是因为as much as 是固定用法吗？谢谢。
第4句错，什么跟什么在比？
其它对。第2句不是在比较，as much as是固定用法，表示“多达...”，修饰100 dollars.
