Get up early and you'll arrive there on time.

这里是“要求”你去做事,所以是祈使句,也就是把句首的you这个主语去掉：
1 Get up early ,and you'll arrive there on time.
2 Get up early,or you will be late.
3 Don't tell him I am late.
动名词------指的是一件事情：Getting up early before 5:00am in winter is a bad thing to me.
在冬天上午5：00起床对我来说太糟糕了.
窍门：如果please能放在句首的,你就用动词原形作为祈使句.
(Please) go there with me.

祈使句表示建议