非谓语动词是指不作谓语的动词形式即:doing ,to do ,done 这几种形式,它们分别叫作动名词/现在分词,不定式,过去分词,这些形式在句中可以作除了谓语以外的其它成分如:I like swimming .(动句词作宾语)
Our task is to clean our classroom this afternoon.(不定式作表语)
The boy standing at the door is our monitor.(现在分词短语作定语)
When making a speech ,you should speak as clearly as you can to make yourself understood.(understood是过去分词作宾语补足语)