买不起的用法和样例：
例句
-
这书要是你买不起新的，你或许能找到一本旧的。
If you can't afford a new copy of the book, perhaps you can find a second-hand one. -
我们要是买不起汽车，也就只好不用（汽车）了。
If we can't afford a car, we'll just have to do without (one). -
那时他们非常穷，买不起房子。
They were very poor at that time and couldn't afford a house. -
我买不起。
I can't afford it. -
我们买不起汽车，没有车库的事就更不必说了。
We can't afford a car, not to mention the fact that we have no garage.
