再举一下例子吧
追答比如说,
动词不定式To prove my theory,I give him an example.意思是,为了证明我的理论,我给他举了一个例子。
祈使句Put down your gun and hands up.意思是,把枪放下,举起手来,有命令的意思,是是祈使句,所以用动词原形开头。
其他的情况都可以用ing
Dancing with him,I put my hand on his shoulder.意思是,跟他跳舞的时候,我把手放在他的肩上。
动词连动的有:I went into the classroom,put down my bag and sit down on my chair.