问下后置定语请问是Theprofessorexplainstwowaysplantusingtoprotectthemselves.还是heprofessorexplainstwowaysplantusedtoprotectthemeselves.怎么区别呢,

Question

问下后置定语
请问是The professor explains two ways plant using to protect themselves.
还是he professor explains two ways plant used to protect themeselves.
怎么区别呢,

Answer 1

当然是The professor explains two ways plant using to protect themselves.
因为use的主语是plant,植物用来保护自己的两种办法.这是主动的,非谓语动词要用ing.
过去分词表示的话,use的主语要变成ways ,方法是被用的,被植物用的,就会用used,表被动.
two ways used by plants