The boy spent as much as he could ___ on the Int

Question

rnet with their friends. a.chat b.chatting c. to chat d. chatted 为什么选B？could 后面不是应该跟动词原形吗？

Answer 1

你说的对，could后面是接动词原形。不过这里could并不是谓语呀，它前面还有好几个词呢呀。
as much as he could其实省略了spend，在这里翻译成花费尽可能多的钱去做某事。所以用to do表示目的。追答

不好意思，不是用to do。该用doing。spend money or time doing sth。

Answer 2

spend some （in）doing

省略in，剩下的就是ing动词了。