英语语法题,是语法老师请进,

问题描述:

英语语法题,是语法老师请进,
1.But I decided to dismbark _____ anything.
a.before I would buy b.before buying
2.The man said that although the pen was worth 50 pounds,as a special favour,_____ for 30 pounds.
a.he would let it to me b.he might give me
以上答案分别是 B ,B.请问为什么,那么另外一个答案什么不对?

1题中 decide to do sth 为固定搭配 决定做某事b选项中before doing sth 做某事之前 (完全正确的用法)其中before做介词,整个结构为状语,修饰前面的动词而a选项中结构before +句子的构成中,before做连词,连接两个并...