作为第一个单词,动词+ ing 变成名词（动名词）,后面要另加动词,比如：
Listening to you makes me tired.You talk too much.
Coming home is always such a good feeling.
如果第一个单词是动词原型,一般来说这种句子是祈使句,例：
Listen to your mother.She only wants what's best for you.
Go and get yourself an ice cream.
Be good.Don't get in trouble.