在英语的表达中为什么要用不定式,是不是要表达的部分是一句句子（指有逻辑关系）?

理解英语语法不能用汉字,那个infinitive不是不定式,而是无限式的含义,如果非要用汉字的话.就是说话没说完接着说的意思.不要上了汉字语法的当.祝进步.
I want you to know that the infinitive tells you to keep on talking about the things you want to say,and say them until everybody understands what you want to tell them.
Did you get that?