There will be a discussion tomorrow,all those who want to take part,please raise your hand.
问题描述：
There will be a discussion tomorrow,all those who want to take part,please raise your hand.
为什么不用take part in .能给我说说什么时候结尾可以用介词,什么时候不用.
答
英语里有一些动词词组,在接宾语的时候,需要有介系词,无宾语的时候,介系词要省略,比如：
Take care.
Take care of your brother.
I have my parents to take care of.（这里因为是动词不定式作定语,形成反射不定式结构,介系词不能省略）
这里take part后没有宾语,无须加介系词in,希望我能帮助你解疑释惑.