一、start to do
开始做;开始去做某事;开始做某事
二、start doing something
英 [stɑ:t du: smθi] 美 [stɑrt du smθ]
开始做某事
例句：
1、The machines start to wear down, they don't make as many nuts and bolts as they used to
机器开始出现磨损，螺母和螺钉的产量不如从前了。
2、You can't get very far until you start doing something for somebody else.
当你为他人做了些事情，你才能走得更远。
温馨提示：
