短语讲解：

1. Native speakers do not think about the difference.

think about 考虑…; 捉摸…
例句：Even now when I think about it I feel pain in my heart.
就是现在想起来我心里都感到难受。

2. But English learners have to memorize the hundreds of different verb combinations.

hundreds of 好几百，许许多多
例句：Money to the extent of hundreds of thousands was set in motion.
流通的金钱达几十万金元之多。

3. Next time you read or listen to a VOA Learning English story, pay attention to use of gerunds and infinitives.

pay attention to 注意
例句：In doing our work, we must pay attention to ways and means.
做工作应注意方式方法。