一、高频固定搭配
1. be good at doing sth. 擅长做某事
2. be interested in doing sth. 对做某事感兴趣
3. look forward to doing sth. 期待做某事
4. be used to doing sth. 习惯于做某事
5. can't help doing sth. 忍不住做某事
6. have fun doing sth. 做某事很开心
二、语法线索
1. 时态标志词判断时态。
2. 主谓一致判断动词形式。
3. 介词后接动词-ing形式。
4. 情态动词后接动词原形。
三、例题
I look forward to ______ from you soon.
A. hear B. hearing C. heard D. hears
解析:look forward to中的to是介词,后接动名词,故选hearing。