When did you start to do jogging?

你什么时候开始慢跑的？

Start to do new yourself.

重新开始做全新的自己。

Think hard before you start to do something.

仔细想想，然后再开始做一些事情。

When I start to do, things start to be done!

当我开始做，事情开始被做！

I'm afraid he'll chicken out when we really start to do it.

我担心在我们真动手干的时候他会害怕而退出。